131715720 has 112 divisors (see below), whose sum is σ = 444435660. Its totient is φ = 35116416.

The previous prime is 131715713. The next prime is 131715737. The reversal of 131715720 is 27517131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 108618084 + 23097636 = 10422^2 + 4806^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 26902 + ... + 31418.

Almost surely, 2^131715720 is an apocalyptic number.

131715720 is a gapful number since it is divisible by the number (10) 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 131715720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222217830).

131715720 is an abundant number, since it is smaller than the sum of its proper divisors (312719940).

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

131715720 is an equidigital number, since it uses as much as digits as its factorization.

131715720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546 (or 4527 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 131715720 is about 11476.7469258497. The cubic root of 131715720 is about 508.7985559767.

The spelling of 131715720 in words is "one hundred thirty-one million, seven hundred fifteen thousand, seven hundred twenty".