3131120331 has 6 divisors (see below), whose sum is σ = 4522729380. Its totient is φ = 2087413548.

The previous prime is 3131120309. The next prime is 3131120347. The reversal of 3131120331 is 1330211313.

It is a happy number.

3131120331 is a `hidden beast` number, since 3 + 1 + 311 + 20 + 331 = 666.

3131120331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3131120331 - 2⁹ = 3131119819 is a prime.

It is a super-2 number, since 2×3131120331² = 19607829054403099122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3131120351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173951121 + ... + 173951138.

It is an arithmetic number, because the mean of its divisors is an integer number (753788230).

Almost surely, 2^3131120331 is an apocalyptic number.

3131120331 is a deficient number, since it is larger than the sum of its proper divisors (1391609049).

3131120331 is a wasteful number, since it uses less digits than its factorization.

3131120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347902265 (or 347902262 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 3131120331 is about 55956.4145652668. The cubic root of 3131120331 is about 1462.9626976926.

Adding to 3131120331 its reverse (1330211313), we get a palindrome (4461331644).

The spelling of 3131120331 in words is "three billion, one hundred thirty-one million, one hundred twenty thousand, three hundred thirty-one".