315520020520 has 32 divisors (see below), whose sum is σ = 712682404200. Its totient is φ = 125716922368.

The previous prime is 315520020493. The next prime is 315520020577. The reversal of 315520020520 is 25020025513.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 309062612356 + 6457408164 = 555934^2 + 80358^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15336025 + ... + 15356584.

Almost surely, 2^315520020520 is an apocalyptic number.

It is an amenable number.

315520020520 is an abundant number, since it is smaller than the sum of its proper divisors (397162383680).

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

315520020520 is a wasteful number, since it uses less digits than its factorization.

315520020520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30692877 (or 30692873 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 315520020520 in words is "three hundred fifteen billion, five hundred twenty million, twenty thousand, five hundred twenty".