3131313020 has 36 divisors (see below), whose sum is σ = 7227904152. Its totient is φ = 1138658400.

The previous prime is 3131313013. The next prime is 3131313041. The reversal of 3131313020 is 203131313.

3131313020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3131313020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 644546 + ... + 649385.

Almost surely, 2^3131313020 is an apocalyptic number.

It is an amenable number.

3131313020 is an abundant number, since it is smaller than the sum of its proper divisors (4096591132).

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

3131313020 is a wasteful number, since it uses less digits than its factorization.

3131313020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293962 (or 1293949 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 3131313020 is about 55958.1363163571. The cubic root of 3131313020 is about 1462.9927072959.

Adding to 3131313020 its reverse (203131313), we get a palindrome (3334444333).

The spelling of 3131313020 in words is "three billion, one hundred thirty-one million, three hundred thirteen thousand, twenty".