131504931 has 16 divisors (see below), whose sum is σ = 195379200. Its totient is φ = 87419304.

The previous prime is 131504921. The next prime is 131504939. The reversal of 131504931 is 139405131.

It is not a de Polignac number, because 131504931 - 2⁵ = 131504899 is a prime.

It is a super-2 number, since 2×131504931² = 34587093754629522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 131504895 and 131504904.

It is not an unprimeable number, because it can be changed into a prime (131504939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2910 + ... + 16476.

It is an arithmetic number, because the mean of its divisors is an integer number (12211200).

Almost surely, 2^131504931 is an apocalyptic number.

131504931 is a deficient number, since it is larger than the sum of its proper divisors (63874269).

131504931 is a wasteful number, since it uses less digits than its factorization.

131504931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13935 (or 13929 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 131504931 is about 11467.5599409813. The cubic root of 131504931 is about 508.5269953733.

It can be divided in two parts, 13150 and 4931, that added together give a palindrome (18081).

The spelling of 131504931 in words is "one hundred thirty-one million, five hundred four thousand, nine hundred thirty-one".