31311758338 has 16 divisors (see below), whose sum is σ = 54032782464. Its totient is φ = 13330454400.

The previous prime is 31311758333. The next prime is 31311758341. The reversal of 31311758338 is 83385711313.

It is a junction number, because it is equal to n+sod(n) for n = 31311758294 and 31311758303.

It is not an unprimeable number, because it can be changed into a prime (31311758333) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7403695 + ... + 7407922.

It is an arithmetic number, because the mean of its divisors is an integer number (3377048904).

Almost surely, 2^31311758338 is an apocalyptic number.

31311758338 is a deficient number, since it is larger than the sum of its proper divisors (22721024126).

31311758338 is a wasteful number, since it uses less digits than its factorization.

31311758338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14811777.

The product of its digits is 181440, while the sum is 43.

The spelling of 31311758338 in words is "thirty-one billion, three hundred eleven million, seven hundred fifty-eight thousand, three hundred thirty-eight".