131215172 has 24 divisors (see below), whose sum is σ = 257275200. Its totient is φ = 58030560.

The previous prime is 131215153. The next prime is 131215193. The reversal of 131215172 is 271512131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38672 + ... + 41927.

It is an arithmetic number, because the mean of its divisors is an integer number (10719800).

Almost surely, 2^131215172 is an apocalyptic number.

It is an amenable number.

131215172 is a deficient number, since it is larger than the sum of its proper divisors (126060028).

131215172 is a wasteful number, since it uses less digits than its factorization.

131215172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80651 (or 80649 counting only the distinct ones).

The product of its digits is 420, while the sum is 23.

The square root of 131215172 is about 11454.9191180034. The cubic root of 131215172 is about 508.1532232533.

The spelling of 131215172 in words is "one hundred thirty-one million, two hundred fifteen thousand, one hundred seventy-two".