115312131 has 24 divisors (see below), whose sum is σ = 186142320. Its totient is φ = 68179200.

The previous prime is 115312129. The next prime is 115312151. The reversal of 115312131 is 131213511.

115312131 is a `hidden beast` number, since 1 + 1 + 531 + 2 + 131 = 666.

It is not a de Polignac number, because 115312131 - 2¹ = 115312129 is a prime.

It is a super-2 number, since 2×115312131² = 26593775111522322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115312151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10146 + ... + 18263.

It is an arithmetic number, because the mean of its divisors is an integer number (7755930).

Almost surely, 2^115312131 is an apocalyptic number.

115312131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115312131 is a deficient number, since it is larger than the sum of its proper divisors (70830189).

115312131 is a wasteful number, since it uses less digits than its factorization.

115312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28467 (or 28464 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 115312131 is about 10738.3486160582. The cubic root of 115312131 is about 486.7339796073.

Adding to 115312131 its reverse (131213511), we get a palindrome (246525642).

The spelling of 115312131 in words is "one hundred fifteen million, three hundred twelve thousand, one hundred thirty-one".