131597232 has 80 divisors (see below), whose sum is σ = 377975808. Its totient is φ = 39179520.

The previous prime is 131597231. The next prime is 131597233. The reversal of 131597232 is 232795131.

It is an interprime number because it is at equal distance from previous prime (131597231) and next prime (131597233).

It is a junction number, because it is equal to n+sod(n) for n = 131597193 and 131597202.

It is not an unprimeable number, because it can be changed into a prime (131597231) 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, 15943 + ... + 22745.

Almost surely, 2^131597232 is an apocalyptic number.

131597232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131597232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188987904).

131597232 is an abundant number, since it is smaller than the sum of its proper divisors (246378576).

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

131597232 is a wasteful number, since it uses less digits than its factorization.

131597232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6858 (or 6852 counting only the distinct ones).

The product of its digits is 11340, while the sum is 33.

The square root of 131597232 is about 11471.5836744540. The cubic root of 131597232 is about 508.6459429357.

The spelling of 131597232 in words is "one hundred thirty-one million, five hundred ninety-seven thousand, two hundred thirty-two".