Shyam Sunder Gupta

If the digital root of a number is 3 or 6, then that number can not be a perfect power. For more on such curiosities, Refer "Exploring the Beauty of Fascinating Numbers" published by Springer(March 25). amazon.com/Exploring-Beau…

@sonukg4india 2592 is known as printer error number. Other example includes (3^4) x 425 = 34425, Such numbers are infinite. For more on such number curiosities, refer "Exploring the Beauty of Fascinating Numbers" published by Springer in March 2025. amazon.com/Exploring-Beau…

The figure of mathematics

@PhysInHistory The largest happy number with distinct digits is 986543210. For detail coverage on happy numbers, Refer chapter 7 on "Happy Numbers" in the book "Exploring the Beauty of Fascinating Numbers" published by Springer(March 25). amazon.com/Exploring-Beau…

Ever heard of a happy number? ✍️ A happy number is a number that eventually reaches 1 when you repeatedly replace it with the sum of the squares of its digits. If it never reaches 1 and instead falls into a repeating cycle that doesn’t include 1, it’s called an unhappy number or sad number.

For n > 0, the digital root of Fermat Numbers F_n is 5, if n is odd and 8, if n is even. For more such number curiosities: Refer the book "Exploring the Beauty of Fascinating Numbers" published by Springer (March 25). amazon.com/Exploring-Beau…

148349 is the only number in decimal system which is equal to the sum of the subfactorials of its digits. 148349 = !1 + !4 + !8 + !3 + !4 + !9 For more, refer "Exploring the Beauty of Fascinating Numbers" book published by Springer in March 25. amazon.com/Exploring-Beau…

Find the largest possible value of the ratio of a four- digit number to the sum of its digits. Refer the book "Creative Puzzles to Ignite your mind" published by Springer and featured in The Guardian (UK) in Sept 23. theguardian.com/science/2023/s… amazon.com/Creative-Puzzl…

Pleasant memories of Joyful moments at 16th Gathering 4 Gardner Conference G4G16 (2026) at San Francisco (USA): linkedin.com/posts/shyam-su…

The Presentation on “The Joy in Exploring the Beauty of Numbers” linkedin.com/posts/shyam-su… I had the privilege of presenting a Talk on “The Joy in Exploring the Beauty of Numbers” on 15th March 2026 at 1 PM(ET) hosted by Colm Mulcahy from Atlanta (USA) on Zoom.

Polydivisible numbers: linkedin.com/posts/shyam-su…

Maximum three Friday 13th and minimum one in a year is possible. 2025 contained one Friday 13th and 2026 contain three Friday 13th (Feb, March and Nov). linkedin.com/posts/shyam-su…

One of the earliest uses of zero in a magic square at Khajuraho temples In India linkedin.com/posts/shyam-su…

Pleasant memories of Joyful moments at 16th Gathering 4 Gardner Conference G4G16 (2026) at San Francisco (USA): linkedin.com/posts/shyam-su…

The effect of superstition of the number 13 or an amazing coincidence linkedin.com/posts/shyam-su…

Ulam Numbers: pballew.blogspot.com/2025/08/i-dont…

linkedin.com/posts/shyam-su… AUTOBIOGRAPHICAL NUMBERS: 1210 is the smallest autobiographical number. 6210001000 is the largest autobiographical number in the decimal system. Refer, “Exploring the Beauty of Fascinating Numbers” published in March 2025 by SPRINGER.

The Presentation on “The Joy in Exploring the Beauty of Numbers” linkedin.com/posts/shyam-su…