317213665 has 8 divisors (see below), whose sum is σ = 382857768. Its totient is φ = 252303360.

The previous prime is 317213657. The next prime is 317213671. The reversal of 317213665 is 566312713.

It can be written as a sum of positive squares in 4 ways, for example, as 73822464 + 243391201 = 8592^2 + 15601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 317213665 - 2³ = 317213657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 317213665.

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, 182496 + ... + 184225.

It is an arithmetic number, because the mean of its divisors is an integer number (47857221).

Almost surely, 2^317213665 is an apocalyptic number.

It is an amenable number.

317213665 is a deficient number, since it is larger than the sum of its proper divisors (65644103).

317213665 is a wasteful number, since it uses less digits than its factorization.

317213665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366899.

The product of its digits is 22680, while the sum is 34.

The square root of 317213665 is about 17810.4931150151. The cubic root of 317213665 is about 681.9993528601. Note that the first 3 decimals are identical.

The spelling of 317213665 in words is "three hundred seventeen million, two hundred thirteen thousand, six hundred sixty-five".