53515625 has 18 divisors (see below), whose sum is σ = 67382778. Its totient is φ = 42500000.

The previous prime is 53515613. The next prime is 53515639. The reversal of 53515625 is 52651535.

It can be written as a sum of positive squares in 9 ways, for example, as 19829209 + 33686416 = 4453^2 + 5804^2 .

It is not a de Polignac number, because 53515625 - 2⁸ = 53515369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53515591 and 53515600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 390557 + ... + 390693.

Almost surely, 2^53515625 is an apocalyptic number.

It is an amenable number.

53515625 is a deficient number, since it is larger than the sum of its proper divisors (13867153).

53515625 is an frugal number, since it uses more digits than its factorization.

53515625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 142 counting only the distinct ones).

The product of its digits is 22500, while the sum is 32.

The square root of 53515625 is about 7315.4374441998. The cubic root of 53515625 is about 376.8427814361.

The spelling of 53515625 in words is "fifty-three million, five hundred fifteen thousand, six hundred twenty-five".