317988321 has 16 divisors (see below), whose sum is σ = 485267328. Its totient is φ = 181440000.

The previous prime is 317988283. The next prime is 317988329. The reversal of 317988321 is 123889713.

It is not a de Polignac number, because 317988321 - 2⁶ = 317988257 is a prime.

It is a super-2 number, since 2×317988321² = 202233144584798082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (317988329) 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, 3921 + ... + 25521.

It is an arithmetic number, because the mean of its divisors is an integer number (30329208).

Almost surely, 2^317988321 is an apocalyptic number.

It is an amenable number.

317988321 is a deficient number, since it is larger than the sum of its proper divisors (167279007).

317988321 is a wasteful number, since it uses less digits than its factorization.

317988321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22312.

The product of its digits is 72576, while the sum is 42.

The square root of 317988321 is about 17832.2270342209. The cubic root of 317988321 is about 682.5540635298.

The spelling of 317988321 in words is "three hundred seventeen million, nine hundred eighty-eight thousand, three hundred twenty-one".