115172131 has 2 divisors, whose sum is σ = 115172132. Its totient is φ = 115172130.

The previous prime is 115172119. The next prime is 115172159. The reversal of 115172131 is 131271511.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115172131 is a prime.

It is a super-2 number, since 2×115172131² = 26529239518162322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115172191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57586065 + 57586066.

It is an arithmetic number, because the mean of its divisors is an integer number (57586066).

Almost surely, 2^115172131 is an apocalyptic number.

115172131 is a deficient number, since it is larger than the sum of its proper divisors (1).

115172131 is an equidigital number, since it uses as much as digits as its factorization.

115172131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 22.

The square root of 115172131 is about 10731.8279430859. The cubic root of 115172131 is about 486.5369192389.

The spelling of 115172131 in words is "one hundred fifteen million, one hundred seventy-two thousand, one hundred thirty-one".