31513453204 has 12 divisors (see below), whose sum is σ = 55152414324. Its totient is φ = 15755620544.

The previous prime is 31513453201. The next prime is 31513453253. The reversal of 31513453204 is 40235431513.

It can be written as a sum of positive squares in 2 ways, for example, as 1895731600 + 29617721604 = 43540^2 + 172098^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31513453201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210667 + ... + 327730.

It is an arithmetic number, because the mean of its divisors is an integer number (4596034527).

Almost surely, 2^31513453204 is an apocalyptic number.

It is an amenable number.

31513453204 is a deficient number, since it is larger than the sum of its proper divisors (23638961120).

31513453204 is a wasteful number, since it uses less digits than its factorization.

31513453204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553034 (or 553032 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 31513453204 its reverse (40235431513), we get a palindrome (71748884717).

The spelling of 31513453204 in words is "thirty-one billion, five hundred thirteen million, four hundred fifty-three thousand, two hundred four".