131131512 has 48 divisors (see below), whose sum is σ = 361179000. Its totient is φ = 42968256.

The previous prime is 131131493. The next prime is 131131543. The reversal of 131131512 is 215131131.

It is a super-2 number, since 2×131131512² = 34390946878812288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11187 + ... + 19682.

Almost surely, 2^131131512 is an apocalyptic number.

131131512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131131512 is an abundant number, since it is smaller than the sum of its proper divisors (230047488).

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

131131512 is a wasteful number, since it uses less digits than its factorization.

131131512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30940 (or 30933 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 131131512 is about 11451.2668294822. The cubic root of 131131512 is about 508.0452044011.

Adding to 131131512 its reverse (215131131), we get a palindrome (346262643).

It can be divided in two parts, 1311 and 31512, that added together give a palindrome (32823).

The spelling of 131131512 in words is "one hundred thirty-one million, one hundred thirty-one thousand, five hundred twelve".