115915831 has 8 divisors (see below), whose sum is σ = 120116480. Its totient is φ = 111783672.

The previous prime is 115915817. The next prime is 115915859. The reversal of 115915831 is 138519511.

It is a happy number.

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 115915831 - 2⁷ = 115915703 is a prime.

It is a super-2 number, since 2×115915831² = 26872959752841122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115915801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13665 + ... + 20458.

It is an arithmetic number, because the mean of its divisors is an integer number (15014560).

Almost surely, 2^115915831 is an apocalyptic number.

115915831 is a deficient number, since it is larger than the sum of its proper divisors (4200649).

115915831 is an equidigital number, since it uses as much as digits as its factorization.

115915831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34245.

The product of its digits is 5400, while the sum is 34.

The square root of 115915831 is about 10766.4214574760. The cubic root of 115915831 is about 487.5819100587.

The spelling of 115915831 in words is "one hundred fifteen million, nine hundred fifteen thousand, eight hundred thirty-one".