131515320 has 32 divisors (see below), whose sum is σ = 394546320. Its totient is φ = 35070720.

The previous prime is 131515309. The next prime is 131515327. The reversal of 131515320 is 23515131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131515327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547861 + ... + 548100.

Almost surely, 2^131515320 is an apocalyptic number.

131515320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131515320 is an abundant number, since it is smaller than the sum of its proper divisors (263031000).

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

131515320 is a wasteful number, since it uses less digits than its factorization.

131515320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095975 (or 1095971 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131515320 is about 11468.0129054688. The cubic root of 131515320 is about 508.5403863740.

The spelling of 131515320 in words is "one hundred thirty-one million, five hundred fifteen thousand, three hundred twenty".