311143004312 has 16 divisors (see below), whose sum is σ = 666735009360. Its totient is φ = 133347001824.

The previous prime is 311143004309. The next prime is 311143004327. The reversal of 311143004312 is 213400341113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778062483 + ... + 2778062594.

It is an arithmetic number, because the mean of its divisors is an integer number (41670938085).

Almost surely, 2^311143004312 is an apocalyptic number.

It is an amenable number.

311143004312 is an abundant number, since it is smaller than the sum of its proper divisors (355592005048).

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

311143004312 is a wasteful number, since it uses less digits than its factorization.

311143004312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556125090 (or 5556125086 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 311143004312 its reverse (213400341113), we get a palindrome (524543345425).

The spelling of 311143004312 in words is "three hundred eleven billion, one hundred forty-three million, four thousand, three hundred twelve".