311323222 has 8 divisors (see below), whose sum is σ = 533696976. Its totient is φ = 133424232.

The previous prime is 311323171. The next prime is 311323223. The reversal of 311323222 is 222323113.

311323222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×311323222² = 193844297112922568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311323222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311323223) 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, 11118673 + ... + 11118700.

It is an arithmetic number, because the mean of its divisors is an integer number (66712122).

Almost surely, 2^311323222 is an apocalyptic number.

311323222 is a deficient number, since it is larger than the sum of its proper divisors (222373754).

311323222 is a wasteful number, since it uses less digits than its factorization.

311323222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22237382.

The product of its digits is 432, while the sum is 19.

The square root of 311323222 is about 17644.3538277830. The cubic root of 311323222 is about 677.7515281800.

Adding to 311323222 its reverse (222323113), we get a palindrome (533646335).

It can be divided in two parts, 3113 and 23222, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 311323222 in words is "three hundred eleven million, three hundred twenty-three thousand, two hundred twenty-two".