315231131020 has 24 divisors (see below), whose sum is σ = 712907327664. Its totient is φ = 116393032896.

The previous prime is 315231131003. The next prime is 315231131071. The reversal of 315231131020 is 20131132513.

It is a junction number, because it is equal to n+sod(n) for n = 315231130982 and 315231131000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606213454 + ... + 606213973.

It is an arithmetic number, because the mean of its divisors is an integer number (29704471986).

Almost surely, 2^315231131020 is an apocalyptic number.

It is an amenable number.

315231131020 is an abundant number, since it is smaller than the sum of its proper divisors (397676196644).

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

315231131020 is a wasteful number, since it uses less digits than its factorization.

315231131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212427449 (or 1212427447 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 315231131020 its reverse (20131132513), we get a palindrome (335362263533).

The spelling of 315231131020 in words is "three hundred fifteen billion, two hundred thirty-one million, one hundred thirty-one thousand, twenty".