53015625 has 84 divisors (see below), whose sum is σ = 106639260. Its totient is φ = 25200000.

The previous prime is 53015597. The next prime is 53015659. The reversal of 53015625 is 52651035.

53015625 is a `hidden beast` number, since 5 + 30 + 1 + 5 + 625 = 666.

It can be written as a sum of positive squares in 14 ways, for example, as 35676729 + 17338896 = 5973^2 + 4164^2 .

It is not a de Polignac number, because 53015625 - 2⁷ = 53015497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 1828111 + ... + 1828139.

It is an arithmetic number, because the mean of its divisors is an integer number (1269515).

Almost surely, 2^53015625 is an apocalyptic number.

It is an amenable number.

53015625 is an abundant number, since it is smaller than the sum of its proper divisors (53623635).

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

53015625 is an equidigital number, since it uses as much as digits as its factorization.

53015625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 53015625 is about 7281.1829396053. The cubic root of 53015625 is about 375.6654849807.

The spelling of 53015625 in words is "fifty-three million, fifteen thousand, six hundred twenty-five".