18181
This number is a prime.
Single Curio View: (Seek other curios for this number)
The only palindromic prime P that is the sum of the squares
of the first n oban numbers, i.e., (3^2 + 5^2 + 6^2 +...+
39^2 + 50^2), (case n=30). Curiously, sod(P) is the
smallest invertible prime. [Bajpai]
Submitted: 2019-01-26 20:55:55; Last Modified: 2019-01-26 21:57:33.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell