316721222 has 12 divisors (see below), whose sum is σ = 500259420. Its totient is φ = 149973876.

The previous prime is 316721173. The next prime is 316721227. The reversal of 316721222 is 222127613.

It is a junction number, because it is equal to n+sod(n) for n = 316721191 and 316721200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316721227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108263 + ... + 111149.

It is an arithmetic number, because the mean of its divisors is an integer number (41688285).

Almost surely, 2^316721222 is an apocalyptic number.

316721222 is a deficient number, since it is larger than the sum of its proper divisors (183538198).

316721222 is an frugal number, since it uses more digits than its factorization.

316721222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795 (or 2908 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 316721222 is about 17796.6632265714. The cubic root of 316721222 is about 681.6462577872.

Adding to 316721222 its reverse (222127613), we get a palindrome (538848835).

It can be divided in two parts, 3167 and 21222, that added together give a cube (24389 = 29³).

The spelling of 316721222 in words is "three hundred sixteen million, seven hundred twenty-one thousand, two hundred twenty-two".