317157172 has 6 divisors (see below), whose sum is σ = 555025058. Its totient is φ = 158578584.

The previous prime is 317157167. The next prime is 317157199. The reversal of 317157172 is 271751713.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 172291876 + 144865296 = 13126^2 + 12036^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39644643 + ... + 39644650.

Almost surely, 2^317157172 is an apocalyptic number.

It is an amenable number.

317157172 is a deficient number, since it is larger than the sum of its proper divisors (237867886).

317157172 is a wasteful number, since it uses less digits than its factorization.

317157172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79289297 (or 79289295 counting only the distinct ones).

The product of its digits is 10290, while the sum is 34.

The square root of 317157172 is about 17808.9070972926. The cubic root of 317157172 is about 681.9588644017.

The spelling of 317157172 in words is "three hundred seventeen million, one hundred fifty-seven thousand, one hundred seventy-two".