311312442 has 32 divisors (see below), whose sum is σ = 721325952. Its totient is φ = 87727104.

The previous prime is 311312431. The next prime is 311312489. The reversal of 311312442 is 244213113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 47703 + ... + 53834.

It is an arithmetic number, because the mean of its divisors is an integer number (22541436).

Almost surely, 2^311312442 is an apocalyptic number.

311312442 is an abundant number, since it is smaller than the sum of its proper divisors (410013510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311312442 is a wasteful number, since it uses less digits than its factorization.

311312442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101622.

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

The square root of 311312442 is about 17644.0483449802. The cubic root of 311312442 is about 677.7437053930.

Adding to 311312442 its reverse (244213113), we get a palindrome (555525555).

The spelling of 311312442 in words is "three hundred eleven million, three hundred twelve thousand, four hundred forty-two".