115057731 has 4 divisors (see below), whose sum is σ = 153410312. Its totient is φ = 76705152.

The previous prime is 115057721. The next prime is 115057741. The reversal of 115057731 is 137750511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137750511 = 3 ⋅45916837.

It is an interprime number because it is at equal distance from previous prime (115057721) and next prime (115057741).

It is not a de Polignac number, because 115057731 - 2⁵ = 115057699 is a prime.

It is a super-2 number, since 2×115057731² = 26476562925736722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115057721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19176286 + ... + 19176291.

It is an arithmetic number, because the mean of its divisors is an integer number (38352578).

Almost surely, 2^115057731 is an apocalyptic number.

115057731 is a deficient number, since it is larger than the sum of its proper divisors (38352581).

115057731 is an equidigital number, since it uses as much as digits as its factorization.

115057731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38352580.

The product of its (nonzero) digits is 3675, while the sum is 30.

The square root of 115057731 is about 10726.4966787857. The cubic root of 115057731 is about 486.3757741710.

The spelling of 115057731 in words is "one hundred fifteen million, fifty-seven thousand, seven hundred thirty-one".