316605621 has 4 divisors (see below), whose sum is σ = 422140832. Its totient is φ = 211070412.

The previous prime is 316605593. The next prime is 316605629. The reversal of 316605621 is 126506613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 316605621 - 2⁵ = 316605589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316605629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52767601 + ... + 52767606.

It is an arithmetic number, because the mean of its divisors is an integer number (105535208).

Almost surely, 2^316605621 is an apocalyptic number.

It is an amenable number.

316605621 is a deficient number, since it is larger than the sum of its proper divisors (105535211).

316605621 is a wasteful number, since it uses less digits than its factorization.

316605621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105535210.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 316605621 is about 17793.4151022225. The cubic root of 316605621 is about 681.5633156785.

The spelling of 316605621 in words is "three hundred sixteen million, six hundred five thousand, six hundred twenty-one".