3131122312 has 8 divisors (see below), whose sum is σ = 5870854350. Its totient is φ = 1565561152.

The previous prime is 3131122301. The next prime is 3131122321. The reversal of 3131122312 is 2132211313.

It can be written as a sum of positive squares in only one way, i.e., 3096477316 + 34644996 = 55646^2 + 5886^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 3131122312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195695137 + ... + 195695152.

Almost surely, 2^3131122312 is an apocalyptic number.

It is an amenable number.

3131122312 is a deficient number, since it is larger than the sum of its proper divisors (2739732038).

3131122312 is a wasteful number, since it uses less digits than its factorization.

3131122312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391390295 (or 391390291 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 3131122312 is about 55956.4322665411. The cubic root of 3131122312 is about 1462.9630062221.

Adding to 3131122312 its reverse (2132211313), we get a palindrome (5263333625).

The spelling of 3131122312 in words is "three billion, one hundred thirty-one million, one hundred twenty-two thousand, three hundred twelve".