131972715 has 24 divisors (see below), whose sum is σ = 261432288. Its totient is φ = 60330240.

The previous prime is 131972713. The next prime is 131972723. The reversal of 131972715 is 517279131.

It is not a de Polignac number, because 131972715 - 2¹ = 131972713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131972715.

It is not an unprimeable number, because it can be changed into a prime (131972713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209166 + ... + 209795.

It is an arithmetic number, because the mean of its divisors is an integer number (10893012).

Almost surely, 2^131972715 is an apocalyptic number.

131972715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131972715 is a deficient number, since it is larger than the sum of its proper divisors (129459573).

131972715 is a wasteful number, since it uses less digits than its factorization.

131972715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418979 (or 418976 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 131972715 is about 11487.9378044974. The cubic root of 131972715 is about 509.1292523542.

The spelling of 131972715 in words is "one hundred thirty-one million, nine hundred seventy-two thousand, seven hundred fifteen".