115311531 has 8 divisors (see below), whose sum is σ = 154347984. Its totient is φ = 76574720.

The previous prime is 115311523. The next prime is 115311541. The reversal of 115311531 is 135113511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115311531 - 2³ = 115311523 is a prime.

It is a super-2 number, since 2×115311531² = 26593498363127922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115311498 and 115311507.

It is not an unprimeable number, because it can be changed into a prime (115311541) 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 in 7 ways as a sum of consecutive naturals, for example, 74010 + ... + 75551.

It is an arithmetic number, because the mean of its divisors is an integer number (19293498).

Almost surely, 2^115311531 is an apocalyptic number.

115311531 is a deficient number, since it is larger than the sum of its proper divisors (39036453).

115311531 is a wasteful number, since it uses less digits than its factorization.

115311531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149821.

The product of its digits is 225, while the sum is 21.

The square root of 115311531 is about 10738.3206787654. The cubic root of 115311531 is about 486.7331354033.

The spelling of 115311531 in words is "one hundred fifteen million, three hundred eleven thousand, five hundred thirty-one".