316042221 has 16 divisors (see below), whose sum is σ = 462274560. Its totient is φ = 190467120.

The previous prime is 316042193. The next prime is 316042249. The reversal of 316042221 is 122240613.

It is an interprime number because it is at equal distance from previous prime (316042193) and next prime (316042249).

It is not a de Polignac number, because 316042221 - 2⁷ = 316042093 is a prime.

It is a super-2 number, since 2×316042221² = 199765370909225682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316042621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20845 + ... + 32658.

It is an arithmetic number, because the mean of its divisors is an integer number (28892160).

Almost surely, 2^316042221 is an apocalyptic number.

It is an amenable number.

316042221 is a deficient number, since it is larger than the sum of its proper divisors (146232339).

316042221 is a wasteful number, since it uses less digits than its factorization.

316042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53696.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 316042221 is about 17777.5763533728. The cubic root of 316042221 is about 681.1587947816.

Adding to 316042221 its reverse (122240613), we get a palindrome (438282834).

The spelling of 316042221 in words is "three hundred sixteen million, forty-two thousand, two hundred twenty-one".