157512172 has 12 divisors (see below), whose sum is σ = 276643360. Its totient is φ = 78471216.

The previous prime is 157512163. The next prime is 157512193. The reversal of 157512172 is 271215751.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69972 + ... + 72187.

Almost surely, 2^157512172 is an apocalyptic number.

It is an amenable number.

157512172 is a deficient number, since it is larger than the sum of its proper divisors (119131188).

157512172 is a wasteful number, since it uses less digits than its factorization.

157512172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142440 (or 142438 counting only the distinct ones).

The product of its digits is 4900, while the sum is 31.

The square root of 157512172 is about 12550.3853327298. The cubic root of 157512172 is about 540.0550606865.

The spelling of 157512172 in words is "one hundred fifty-seven million, five hundred twelve thousand, one hundred seventy-two".