157657172 has 24 divisors (see below), whose sum is σ = 280047936. Its totient is φ = 77649408.

The previous prime is 157657169. The next prime is 157657211. The reversal of 157657172 is 271756751.

It is a happy number.

It is a congruent number.

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, 191153 + ... + 191975.

It is an arithmetic number, because the mean of its divisors is an integer number (11668664).

Almost surely, 2^157657172 is an apocalyptic number.

It is an amenable number.

157657172 is a deficient number, since it is larger than the sum of its proper divisors (122390764).

157657172 is a wasteful number, since it uses less digits than its factorization.

157657172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1485 counting only the distinct ones).

The product of its digits is 102900, while the sum is 41.

The square root of 157657172 is about 12556.1607189459. The cubic root of 157657172 is about 540.2207282365.

The spelling of 157657172 in words is "one hundred fifty-seven million, six hundred fifty-seven thousand, one hundred seventy-two".