31520343345204 has 48 divisors (see below), whose sum is σ = 86325985386368. Its totient is φ = 8762412048768.

The previous prime is 31520343345131. The next prime is 31520343345217. The reversal of 31520343345204 is 40254334302513.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5070837199 + ... + 5070843414.

Almost surely, 2^{31520343345204} is an apocalyptic number.

It is an amenable number.

31520343345204 is an abundant number, since it is smaller than the sum of its proper divisors (54805642041164).

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

31520343345204 is a wasteful number, since it uses less digits than its factorization.

31520343345204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141680664 (or 10141680662 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 39.

Adding to 31520343345204 its reverse (40254334302513), we get a palindrome (71774677647717).

The spelling of 31520343345204 in words is "thirty-one trillion, five hundred twenty billion, three hundred forty-three million, three hundred forty-five thousand, two hundred four".