2015116131 has 24 divisors (see below), whose sum is σ = 3309342480. Its totient is φ = 1083758592.

The previous prime is 2015116123. The next prime is 2015116133. The reversal of 2015116131 is 1316115102.

It is a happy number.

It is not a de Polignac number, because 2015116131 - 2³ = 2015116123 is a prime.

It is a super-2 number, since 2×2015116131² = 8121386042832818322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 2015116098 and 2015116107.

It is not an unprimeable number, because it can be changed into a prime (2015116133) 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, 400686 + ... + 405683.

It is an arithmetic number, because the mean of its divisors is an integer number (137889270).

Almost surely, 2^2015116131 is an apocalyptic number.

2015116131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2015116131 is a deficient number, since it is larger than the sum of its proper divisors (1294226349).

2015116131 is a wasteful number, since it uses less digits than its factorization.

2015116131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806403 (or 806396 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 2015116131 is about 44890.0448986187. The cubic root of 2015116131 is about 1263.0872750032.

The spelling of 2015116131 in words is "two billion, fifteen million, one hundred sixteen thousand, one hundred thirty-one".