316968221 has 4 divisors (see below), whose sum is σ = 330749472. Its totient is φ = 303186972.

The previous prime is 316968181. The next prime is 316968229. The reversal of 316968221 is 122869613.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 316968221 - 2²² = 312773917 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 (316968229) 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, 6890591 + ... + 6890636.

It is an arithmetic number, because the mean of its divisors is an integer number (82687368).

Almost surely, 2^316968221 is an apocalyptic number.

It is an amenable number.

316968221 is a deficient number, since it is larger than the sum of its proper divisors (13781251).

316968221 is a wasteful number, since it uses less digits than its factorization.

316968221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13781250.

The product of its digits is 31104, while the sum is 38.

The square root of 316968221 is about 17803.6013491653. The cubic root of 316968221 is about 681.8234085261.

The spelling of 316968221 in words is "three hundred sixteen million, nine hundred sixty-eight thousand, two hundred twenty-one".