31520420512352 has 12 divisors (see below), whose sum is σ = 62055827883756. Its totient is φ = 15760210256160.

The previous prime is 31520420512349. The next prime is 31520420512363. The reversal of 31520420512352 is 25321502402513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492506570474 + ... + 492506570537.

It is an arithmetic number, because the mean of its divisors is an integer number (5171318990313).

Almost surely, 2^{31520420512352} is an apocalyptic number.

31520420512352 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31520420512352 is a deficient number, since it is larger than the sum of its proper divisors (30535407371404).

31520420512352 is an equidigital number, since it uses as much as digits as its factorization.

31520420512352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985013141021 (or 985013141013 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 31520420512352 its reverse (25321502402513), we get a palindrome (56841922914865).

The spelling of 31520420512352 in words is "thirty-one trillion, five hundred twenty billion, four hundred twenty million, five hundred twelve thousand, three hundred fifty-two".