131397532 has 12 divisors (see below), whose sum is σ = 262795120. Its totient is φ = 56313216.

The previous prime is 131397527. The next prime is 131397557. The reversal of 131397532 is 235793131.

It is a happy number.

131397532 is an admirable number.

It is a super-2 number, since 2×131397532² = 34530622831382048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346357 + ... + 2346412.

Almost surely, 2^131397532 is an apocalyptic number.

It is an amenable number.

131397532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131397532 is a wasteful number, since it uses less digits than its factorization.

131397532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692780 (or 4692778 counting only the distinct ones).

The product of its digits is 17010, while the sum is 34.

The square root of 131397532 is about 11462.8762533668. The cubic root of 131397532 is about 508.3885210589.

The spelling of 131397532 in words is "one hundred thirty-one million, three hundred ninety-seven thousand, five hundred thirty-two".