31313431403204 has 24 divisors (see below), whose sum is σ = 55033877001600. Its totient is φ = 15589481045600.

The previous prime is 31313431403201. The next prime is 31313431403231. The reversal of 31313431403204 is 40230413431313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31313431403201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6852554 + ... + 10468254.

It is an arithmetic number, because the mean of its divisors is an integer number (2293078208400).

Almost surely, 2^{31313431403204} is an apocalyptic number.

It is an amenable number.

31313431403204 is a deficient number, since it is larger than the sum of its proper divisors (23720445598396).

31313431403204 is a wasteful number, since it uses less digits than its factorization.

31313431403204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625003 (or 3625001 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 31313431403204 its reverse (40230413431313), we get a palindrome (71543844834517).

The spelling of 31313431403204 in words is "thirty-one trillion, three hundred thirteen billion, four hundred thirty-one million, four hundred three thousand, two hundred four".