31520420512503 has 64 divisors (see below), whose sum is σ = 48289601267712. Its totient is φ = 18140380346880.

The previous prime is 31520420512489. The next prime is 31520420512507. The reversal of 31520420512503 is 30521502402513.

It is not a de Polignac number, because 31520420512503 - 2⁸ = 31520420512247 is a prime.

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 pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7413001 + ... + 10862477.

It is an arithmetic number, because the mean of its divisors is an integer number (754525019808).

Almost surely, 2^{31520420512503} is an apocalyptic number.

31520420512503 is a deficient number, since it is larger than the sum of its proper divisors (16769180755209).

31520420512503 is a wasteful number, since it uses less digits than its factorization.

31520420512503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449744.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 31520420512503 in words is "thirty-one trillion, five hundred twenty billion, four hundred twenty million, five hundred twelve thousand, five hundred three".