316310221 has 8 divisors (see below), whose sum is σ = 327616920. Its totient is φ = 305030208.

The previous prime is 316310171. The next prime is 316310227. The reversal of 316310221 is 122013613.

It can be written as a sum of positive squares in 4 ways, for example, as 26936100 + 289374121 = 5190^2 + 17011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316310221 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 (316310227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19215 + ... + 31651.

It is an arithmetic number, because the mean of its divisors is an integer number (40952115).

Almost surely, 2^316310221 is an apocalyptic number.

It is an amenable number.

316310221 is a deficient number, since it is larger than the sum of its proper divisors (11306699).

316310221 is a wasteful number, since it uses less digits than its factorization.

316310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13343.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 316310221 is about 17785.1123415063. The cubic root of 316310221 is about 681.3512785374.

Adding to 316310221 its reverse (122013613), we get a palindrome (438323834).

The spelling of 316310221 in words is "three hundred sixteen million, three hundred ten thousand, two hundred twenty-one".