115231631 has 2 divisors, whose sum is σ = 115231632. Its totient is φ = 115231630.

The previous prime is 115231621. The next prime is 115231673. The reversal of 115231631 is 136132511.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115231631 is a prime.

It is a super-2 number, since 2×115231631² = 26556657565840322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115231597 and 115231606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115231621) 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, 57615815 + 57615816.

It is an arithmetic number, because the mean of its divisors is an integer number (57615816).

Almost surely, 2^115231631 is an apocalyptic number.

115231631 is a deficient number, since it is larger than the sum of its proper divisors (1).

115231631 is an equidigital number, since it uses as much as digits as its factorization.

115231631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 115231631 is about 10734.5997130773. The cubic root of 115231631 is about 486.6206893972.

The spelling of 115231631 in words is "one hundred fifteen million, two hundred thirty-one thousand, six hundred thirty-one".