231256511 has 2 divisors, whose sum is σ = 231256512. Its totient is φ = 231256510.

The previous prime is 231256483. The next prime is 231256517. The reversal of 231256511 is 115652132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231256511 - 2²⁶ = 164147647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231256517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115628255 + 115628256.

It is an arithmetic number, because the mean of its divisors is an integer number (115628256).

Almost surely, 2^231256511 is an apocalyptic number.

231256511 is a deficient number, since it is larger than the sum of its proper divisors (1).

231256511 is an equidigital number, since it uses as much as digits as its factorization.

231256511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 231256511 is about 15207.1204045999. The cubic root of 231256511 is about 613.8062736981.

The spelling of 231256511 in words is "two hundred thirty-one million, two hundred fifty-six thousand, five hundred eleven".