131715904 has 42 divisors (see below), whose sum is σ = 275902674. Its totient is φ = 62380800.

The previous prime is 131715901. The next prime is 131715919. The reversal of 131715904 is 409517131.

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 5198400 = 11248^2 + 2280^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131715901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20254 + ... + 25954.

Almost surely, 2^131715904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131715904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137951337).

131715904 is an abundant number, since it is smaller than the sum of its proper divisors (144186770).

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

131715904 is an equidigital number, since it uses as much as digits as its factorization.

131715904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751 (or 5722 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 131715904 is about 11476.7549420557. The cubic root of 131715904 is about 508.7987928983.

The spelling of 131715904 in words is "one hundred thirty-one million, seven hundred fifteen thousand, nine hundred four".