13231510931 has 2 divisors, whose sum is σ = 13231510932. Its totient is φ = 13231510930.

The previous prime is 13231510889. The next prime is 13231510961. The reversal of 13231510931 is 13901513231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13231510931 is a prime.

It is a super-2 number, since 2×13231510931² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13231510894 and 13231510903.

It is not a weakly prime, because it can be changed into another prime (13231510961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615755465 + 6615755466.

It is an arithmetic number, because the mean of its divisors is an integer number (6615755466).

Almost surely, 2^13231510931 is an apocalyptic number.

13231510931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231510931 is an equidigital number, since it uses as much as digits as its factorization.

13231510931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The spelling of 13231510931 in words is "thirteen billion, two hundred thirty-one million, five hundred ten thousand, nine hundred thirty-one".