317213561 has 8 divisors (see below), whose sum is σ = 363340800. Its totient is φ = 271289088.

The previous prime is 317213521. The next prime is 317213563. The reversal of 317213561 is 165312713.

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

It is a de Polignac number, because none of the positive numbers 2^k-317213561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317213563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47321 + ... + 53606.

It is an arithmetic number, because the mean of its divisors is an integer number (45417600).

Almost surely, 2^317213561 is an apocalyptic number.

It is an amenable number.

317213561 is a deficient number, since it is larger than the sum of its proper divisors (46127239).

317213561 is a wasteful number, since it uses less digits than its factorization.

317213561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101383.

The product of its digits is 3780, while the sum is 29.

The square root of 317213561 is about 17810.4901953877. The cubic root of 317213561 is about 681.9992783279. Note that the first 3 decimals are identical.

The spelling of 317213561 in words is "three hundred seventeen million, two hundred thirteen thousand, five hundred sixty-one".