317920655 has 32 divisors (see below), whose sum is σ = 449100288. Its totient is φ = 213811200.

The previous prime is 317920607. The next prime is 317920657. The reversal of 317920655 is 556029713.

It is a happy number.

It is not a de Polignac number, because 317920655 - 2¹⁴ = 317904271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317920657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29615 + ... + 38895.

It is an arithmetic number, because the mean of its divisors is an integer number (14034384).

Almost surely, 2^317920655 is an apocalyptic number.

317920655 is a deficient number, since it is larger than the sum of its proper divisors (131179633).

317920655 is a wasteful number, since it uses less digits than its factorization.

317920655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 317920655 is about 17830.3296380073. The cubic root of 317920655 is about 682.5056456304.

The spelling of 317920655 in words is "three hundred seventeen million, nine hundred twenty thousand, six hundred fifty-five".