316572021 has 24 divisors (see below), whose sum is σ = 471196440. Its totient is φ = 204711936.

The previous prime is 316572017. The next prime is 316572049. The reversal of 316572021 is 120275613.

It is a happy number.

316572021 is a `hidden beast` number, since 3 + 1 + 657 + 2 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17766225 + 298805796 = 4215^2 + 17286^2 .

It is not a de Polignac number, because 316572021 - 2² = 316572017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316574021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38725 + ... + 46181.

It is an arithmetic number, because the mean of its divisors is an integer number (19633185).

Almost surely, 2^316572021 is an apocalyptic number.

It is an amenable number.

316572021 is a deficient number, since it is larger than the sum of its proper divisors (154624419).

316572021 is a wasteful number, since it uses less digits than its factorization.

316572021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605 (or 7602 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 316572021 is about 17792.4709076620. The cubic root of 316572021 is about 681.5392043593.

The spelling of 316572021 in words is "three hundred sixteen million, five hundred seventy-two thousand, twenty-one".