317163505 has 4 divisors (see below), whose sum is σ = 380596212. Its totient is φ = 253730800.

The previous prime is 317163493. The next prime is 317163521. The reversal of 317163505 is 505361713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505361713 = 131 ⋅3857723.

It can be written as a sum of positive squares in 2 ways, for example, as 135210384 + 181953121 = 11628^2 + 13489^2 .

It is not a de Polignac number, because 317163505 - 2¹⁹ = 316639217 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 31716346 + ... + 31716355.

It is an arithmetic number, because the mean of its divisors is an integer number (95149053).

Almost surely, 2^317163505 is an apocalyptic number.

It is an amenable number.

317163505 is a deficient number, since it is larger than the sum of its proper divisors (63432707).

317163505 is an equidigital number, since it uses as much as digits as its factorization.

317163505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63432706.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 317163505 is about 17809.0849006904. The cubic root of 317163505 is about 681.9634034937.

The spelling of 317163505 in words is "three hundred seventeen million, one hundred sixty-three thousand, five hundred five".