316023921 has 12 divisors (see below), whose sum is σ = 457186548. Its totient is φ = 210356064.

The previous prime is 316023913. The next prime is 316023923. The reversal of 316023921 is 129320613.

316023921 is a `hidden beast` number, since 3 + 1 + 602 + 39 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 144937521 + 171086400 = 12039^2 + 13080^2 .

It is not a de Polignac number, because 316023921 - 2³ = 316023913 is a prime.

It is a super-2 number, since 2×316023921² = 199742237288428482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (316023923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21010 + ... + 32763.

It is an arithmetic number, because the mean of its divisors is an integer number (38098879).

Almost surely, 2^316023921 is an apocalyptic number.

It is an amenable number.

316023921 is a deficient number, since it is larger than the sum of its proper divisors (141162627).

316023921 is a wasteful number, since it uses less digits than its factorization.

316023921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54432 (or 54429 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 316023921 is about 17777.0616525904. The cubic root of 316023921 is about 681.1456473330.

The spelling of 316023921 in words is "three hundred sixteen million, twenty-three thousand, nine hundred twenty-one".