31323013404 has 24 divisors (see below), whose sum is σ = 76264728960. Its totient is φ = 9987047664.

The previous prime is 31323013399. The next prime is 31323013429. The reversal of 31323013404 is 40431032313.

It is a super-2 number, since 2×31323013404² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56744314 + ... + 56744865.

It is an arithmetic number, because the mean of its divisors is an integer number (3177697040).

Almost surely, 2^31323013404 is an apocalyptic number.

It is an amenable number.

31323013404 is an abundant number, since it is smaller than the sum of its proper divisors (44941715556).

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

31323013404 is a wasteful number, since it uses less digits than its factorization.

31323013404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113489209 (or 113489207 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31323013404 its reverse (40431032313), we get a palindrome (71754045717).

The spelling of 31323013404 in words is "thirty-one billion, three hundred twenty-three million, thirteen thousand, four hundred four".