115931000 has 32 divisors (see below), whose sum is σ = 271280880. Its totient is φ = 46372000.

The previous prime is 115930993. The next prime is 115931051. The reversal of 115931000 is 139511.

It is a super-2 number, since 2×115931000² = 26879993522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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, 56966 + ... + 58965.

Almost surely, 2^115931000 is an apocalyptic number.

115931000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115931000 is an abundant number, since it is smaller than the sum of its proper divisors (155349880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115931000 is a wasteful number, since it uses less digits than its factorization.

115931000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115952 (or 115938 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 115931000 is about 10767.1258931992. The cubic root of 115931000 is about 487.6031778106.

The spelling of 115931000 in words is "one hundred fifteen million, nine hundred thirty-one thousand".