317157072 has 20 divisors (see below), whose sum is σ = 819322560. Its totient is φ = 105719008.

The previous prime is 317157059. The next prime is 317157073. The reversal of 317157072 is 270751713.

It is a super-2 number, since 2×317157072² = 201177216639226368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317157073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3303672 + ... + 3303767.

It is an arithmetic number, because the mean of its divisors is an integer number (40966128).

Almost surely, 2^317157072 is an apocalyptic number.

It is an amenable number.

317157072 is an abundant number, since it is smaller than the sum of its proper divisors (502165488).

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

317157072 is a wasteful number, since it uses less digits than its factorization.

317157072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6607450 (or 6607444 counting only the distinct ones).

The product of its (nonzero) digits is 10290, while the sum is 33.

The square root of 317157072 is about 17808.9042897086. The cubic root of 317157072 is about 681.9587927276.

The spelling of 317157072 in words is "three hundred seventeen million, one hundred fifty-seven thousand, seventy-two".