115331861 has 2 divisors, whose sum is σ = 115331862. Its totient is φ = 115331860.

The previous prime is 115331831. The next prime is 115331899. The reversal of 115331861 is 168133511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114361636 + 970225 = 10694^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 115331861 - 2²² = 111137557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115331831) 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, 57665930 + 57665931.

It is an arithmetic number, because the mean of its divisors is an integer number (57665931).

Almost surely, 2^115331861 is an apocalyptic number.

It is an amenable number.

115331861 is a deficient number, since it is larger than the sum of its proper divisors (1).

115331861 is an equidigital number, since it uses as much as digits as its factorization.

115331861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 115331861 is about 10739.2672468842. The cubic root of 115331861 is about 486.7617382183.

The spelling of 115331861 in words is "one hundred fifteen million, three hundred thirty-one thousand, eight hundred sixty-one".