Friday, May 24, marks the 200th birthday of Alexandrina Victoria who served as the Queen of the United Kingdom of Great Britain and Ireland from 20 June 1837 until her death Jan. 22, 1901.

Victoria became queen on June 20, 1837, 27 days after her 18th birthday. Note that 27 is 3 to the 3rd power. She died in January 1901, 243 days after her 81st birthday. Interestingly, note also that 243 and 81 are 3 to the 5th power and 3 to the 4th power.

Queen Victoria's 200th birthday is also special for a different reason: if numbers 1 to 26 are assigned to letters A-Z, the sum of the letter numbers of her name Alexandrina Victoria equals 200. This unique coincidence intrigued my curiosity about other numbers in Victoria's life. Here are some other numerical brainteasers I constructed to honor Queen Victoria on her bicentennial birthday:

• If Queen Victoria's 200th birthday, 24/5/2019, is split as 24, 5, 20, and 19, interestingly, 19 equals the difference of 24 and 5 and the sum of the prime factors of the reverse of 19, namely 91, equals 7 + 13 = 20.

• Queen Victoria died on 22 January 1901, 122 days before her 82nd birthday and the reverse of 122, namely 221, interpreted as 22/1 coincides with 22 January.

• Moreover, 221 also corresponds to the number of days left in each year after Queen Victoria's birthday.

• Additionally, Queen Victoria kept a daily journal starting from July 1832 until her death, which eventually encompassed 122 volumes.

• Also, this year, 2019, equals 3 times 673 and 673 is coincidentally the 122nd prime number.

• Further, the difference of the squares of the prime factors of 221, namely 13 and 17, equals 120 and interestingly, 120 also equals the product of 24 and 5, the day and month numbers of Victoria's birthday.

• The product of 20 and 6, the day and month numbers of the date Victoria became the queen in 1837, equals 120 too.

• Note also that the prime factors of 2019, namely 3 and 673, are the 2nd and 122nd prime numbers, and the difference of 2 and 122 also equals 120.

• The middle two digits of Queen Victoria's birth year 1819 is 81, the age she died.

• Queen Victoria's name Alexandrina Victoria has 19 letters and if her birthday is expressed as 24/5/19, again, 19 equals 24 minus 5. Additionally, the digits of her birth year, 1819, and the year she became the queen, 1837, each add up to 19 too. Also, the prime multipliers of 245 (24 May) add up to 5 + 7 + 7 = 19.

• Victoria became the queen on the 171st day of 1837 (20/6/1837) and 171 divided by the sum of its digits, namely 9, also equals 19.

• This year, 20 June 2019 will mark the 182nd anniversary of Victoria becoming the queen. Interestingly, 182 is twice 91 and 91 is the reverse of 19. Further, the 182nd prime number is 1091 and 1091 is the reverse of 1901, the year Victoria died.

• Furthermore, 1901 is the 291st prime number, 291 is 3 times 97, and 97 equals the sum of the letter numbers of Victoria.

• The rightmost three digits of 1901 is 901, the reverse of 901 is 109, 109 is the 29th prime number, and 29 is the sum of 24 and 5, the day and month numbers of Victoria's birthdate.

• If Victoria's birthday 24/05/1819 is split in the middle as 2405 and 1819, these two numbers differ by 586 and the difference of the prime factors of 586, namely 2 and 293, yields 291 (see above).

• The sum of the prime factors of 245, representing Victoria's birth date 24/5, equals 5 + 7 = 12 and 12 square is 144. Coincidentally, Victoria was born on the 144th day of 1819. Also note that 24 equals the sum of two 12's.

• Victoria's 206th birthday expressed as 24/5/2025 will also be special for multiple reasons: if split as 245 and 2025, the sum of the squares of the digits of 245 equals 45 and note that 2025 is 45 square. Additionally, 206 interpreted as 20/6 signifies the day Victoria became queen in 1837. Moreover, 206 is twice 103 and 103 equals the sum of the letter numbers of Alexandrina.

• Victoria became queen on 20/6/1837, 27 days after her 18th birthday, and interestingly, the digits of 2061837 add up to 27.

• Lastly, Queen Victoria's tri-centennial birthday to occur in 2119 will also be special for two other reasons: first, twice the difference of the prime factors of 2119, namely 13 and 163, yields 300. Second, the difference of the left and right halves of 22/01/1901, the day Victoria died, equals 2201 – 1901 = 300.

Happy 200th birthday to Queen Victoria.

*Aziz Inan is chair and professor teaching in the electrical engineering program of the Donald P. Shiley School of Engineering at University of Portland. He can be reached at This email address is being protected from spambots. You need JavaScript enabled to view it..*