131015232 has 140 divisors (see below), whose sum is σ = 393395200. Its totient is φ = 43110144.

The previous prime is 131015219. The next prime is 131015237. The reversal of 131015232 is 232510131.

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

It is not an unprimeable number, because it can be changed into a prime (131015237) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 658269 + ... + 658467.

Almost surely, 2^131015232 is an apocalyptic number.

131015232 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 131015232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196697600).

131015232 is an abundant number, since it is smaller than the sum of its proper divisors (262379968).

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

131015232 is a wasteful number, since it uses less digits than its factorization.

131015232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 131015232 is about 11446.1885359276. The cubic root of 131015232 is about 507.8949914186.

Adding to 131015232 its reverse (232510131), we get a palindrome (363525363).

The spelling of 131015232 in words is "one hundred thirty-one million, fifteen thousand, two hundred thirty-two".