31520420512504 has 64 divisors (see below), whose sum is σ = 73773850291200. Its totient is φ = 12265724918400.

The previous prime is 31520420512489. The next prime is 31520420512507. The reversal of 31520420512504 is 40521502402513.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31520420512504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31520420512507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30657184 + ... + 31668655.

It is an arithmetic number, because the mean of its divisors is an integer number (1152716410800).

Almost surely, 2^{31520420512504} is an apocalyptic number.

It is an amenable number.

31520420512504 is an abundant number, since it is smaller than the sum of its proper divisors (42253429778696).

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

31520420512504 is a wasteful number, since it uses less digits than its factorization.

31520420512504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62326684 (or 62326680 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 31520420512504 in words is "thirty-one trillion, five hundred twenty billion, four hundred twenty million, five hundred twelve thousand, five hundred four".