311318518212 has 72 divisors (see below), whose sum is σ = 847771456896. Its totient is φ = 95757165504.

The previous prime is 311318518171. The next prime is 311318518279. The reversal of 311318518212 is 212815813113.

311318518212 is a `hidden beast` number, since 3 + 1 + 131 + 8 + 518 + 2 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1256203 + ... + 1483469.

It is an arithmetic number, because the mean of its divisors is an integer number (11774603568).

Almost surely, 2^311318518212 is an apocalyptic number.

It is an amenable number.

311318518212 is an abundant number, since it is smaller than the sum of its proper divisors (536452938684).

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

311318518212 is a wasteful number, since it uses less digits than its factorization.

311318518212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230217 (or 230212 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The spelling of 311318518212 in words is "three hundred eleven billion, three hundred eighteen million, five hundred eighteen thousand, two hundred twelve".