312131403022312 has 8 divisors (see below), whose sum is σ = 585246380666850. Its totient is φ = 156065701511152.

The previous prime is 312131403022259. The next prime is 312131403022321. The reversal of 312131403022312 is 213220304131213.

It can be written as a sum of positive squares in only one way, i.e., 300944291280516 + 11187111741796 = 17347746^2 + 3344714^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19508212688887 + ... + 19508212688902.

Almost surely, 2^{312131403022312} is an apocalyptic number.

It is an amenable number.

312131403022312 is a deficient number, since it is larger than the sum of its proper divisors (273114977644538).

312131403022312 is a wasteful number, since it uses less digits than its factorization.

312131403022312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39016425377795 (or 39016425377791 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 312131403022312 its reverse (213220304131213), we get a palindrome (525351707153525).

The spelling of 312131403022312 in words is "three hundred twelve trillion, one hundred thirty-one billion, four hundred three million, twenty-two thousand, three hundred twelve".