313131223312 has 20 divisors (see below), whose sum is σ = 606838665420. Its totient is φ = 156527696768.

The previous prime is 313131223267. The next prime is 313131223331. The reversal of 313131223312 is 213322131313.

It can be written as a sum of positive squares in 2 ways, for example, as 264097321216 + 49033902096 = 513904^2 + 221436^2 .

It is a super-2 number, since 2×313131223312² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301487 + ... + 2433742.

It is an arithmetic number, because the mean of its divisors is an integer number (30341933271).

Almost surely, 2^313131223312 is an apocalyptic number.

It is an amenable number.

313131223312 is a deficient number, since it is larger than the sum of its proper divisors (293707442108).

313131223312 is a wasteful number, since it uses less digits than its factorization.

313131223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4739370 (or 4739364 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 313131223312 its reverse (213322131313), we get a palindrome (526453354625).

The spelling of 313131223312 in words is "three hundred thirteen billion, one hundred thirty-one million, two hundred twenty-three thousand, three hundred twelve".