31311142402 has 16 divisors (see below), whose sum is σ = 49824939672. Its totient is φ = 14706365440.

The previous prime is 31311142349. The next prime is 31311142433. The reversal of 31311142402 is 20424111313.

It can be written as a sum of positive squares in 4 ways, for example, as 20187010561 + 11124131841 = 142081^2 + 105471^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866083 + ... + 901510.

Almost surely, 2^31311142402 is an apocalyptic number.

31311142402 is a deficient number, since it is larger than the sum of its proper divisors (18513797270).

31311142402 is a wasteful number, since it uses less digits than its factorization.

31311142402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768133.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31311142402 its reverse (20424111313), we get a palindrome (51735253715).

The spelling of 31311142402 in words is "thirty-one billion, three hundred eleven million, one hundred forty-two thousand, four hundred two".