157831320 has 64 divisors (see below), whose sum is σ = 474829920. Its totient is φ = 41969664.

The previous prime is 157831301. The next prime is 157831321. The reversal of 157831320 is 23138751.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157831321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45984 + ... + 49296.

Almost surely, 2^157831320 is an apocalyptic number.

157831320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157831320 is an abundant number, since it is smaller than the sum of its proper divisors (316998600).

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

157831320 is a wasteful number, since it uses less digits than its factorization.

157831320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724 (or 3720 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 157831320 is about 12563.0935680667. The cubic root of 157831320 is about 540.4195641871.

The spelling of 157831320 in words is "one hundred fifty-seven million, eight hundred thirty-one thousand, three hundred twenty".