115939431 has 36 divisors (see below), whose sum is σ = 178555104. Its totient is φ = 75232800.

The previous prime is 115939427. The next prime is 115939441. The reversal of 115939431 is 134939511.

It is not a de Polignac number, because 115939431 - 2² = 115939427 is a prime.

It is a super-2 number, since 2×115939431² = 26883903321207522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115939441) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 268786 + ... + 269216.

It is an arithmetic number, because the mean of its divisors is an integer number (4959864).

Almost surely, 2^115939431 is an apocalyptic number.

115939431 is a deficient number, since it is larger than the sum of its proper divisors (62615673).

115939431 is an frugal number, since it uses more digits than its factorization.

115939431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 475 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 115939431 is about 10767.5174018898. The cubic root of 115939431 is about 487.6149977228.

The spelling of 115939431 in words is "one hundred fifteen million, nine hundred thirty-nine thousand, four hundred thirty-one".