115861831 has 2 divisors, whose sum is σ = 115861832. Its totient is φ = 115861830.

The previous prime is 115861819. The next prime is 115861853. The reversal of 115861831 is 138168511.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115861831 is a prime.

It is a super-2 number, since 2×115861831² = 26847927765345122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115861861) 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, 57930915 + 57930916.

It is an arithmetic number, because the mean of its divisors is an integer number (57930916).

Almost surely, 2^115861831 is an apocalyptic number.

115861831 is a deficient number, since it is larger than the sum of its proper divisors (1).

115861831 is an equidigital number, since it uses as much as digits as its factorization.

115861831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 34.

The square root of 115861831 is about 10763.9133682876. The cubic root of 115861831 is about 487.5061840986.

The spelling of 115861831 in words is "one hundred fifteen million, eight hundred sixty-one thousand, eight hundred thirty-one".