52521520 has 20 divisors (see below), whose sum is σ = 122112720. Its totient is φ = 21008576.

The previous prime is 52521509. The next prime is 52521559. The reversal of 52521520 is 2512525.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×52521520² = 5517020126220800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 52521491 and 52521500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328180 + ... + 328339.

It is an arithmetic number, because the mean of its divisors is an integer number (6105636).

Almost surely, 2^52521520 is an apocalyptic number.

It is an amenable number.

52521520 is an abundant number, since it is smaller than the sum of its proper divisors (69591200).

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

52521520 is a wasteful number, since it uses less digits than its factorization.

52521520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656532 (or 656526 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 52521520 is about 7247.1732420303. The cubic root of 52521520 is about 374.4947744462.

The spelling of 52521520 in words is "fifty-two million, five hundred twenty-one thousand, five hundred twenty".