317220845 has 16 divisors (see below), whose sum is σ = 384072192. Its totient is φ = 251517120.

The previous prime is 317220817. The next prime is 317220857. The reversal of 317220845 is 548022713.

It is not a de Polignac number, because 317220845 - 2¹² = 317216749 is a prime.

It is a Duffinian number.

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 in 15 ways as a sum of consecutive naturals, for example, 326210 + ... + 327180.

It is an arithmetic number, because the mean of its divisors is an integer number (24004512).

Almost surely, 2^317220845 is an apocalyptic number.

It is an amenable number.

317220845 is a deficient number, since it is larger than the sum of its proper divisors (66851347).

317220845 is a wasteful number, since it uses less digits than its factorization.

317220845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 317220845 is about 17810.6946804441. The cubic root of 317220845 is about 682.0044984123.

The spelling of 317220845 in words is "three hundred seventeen million, two hundred twenty thousand, eight hundred forty-five".