15525625 has 10 divisors (see below), whose sum is σ = 19401602. Its totient is φ = 12420000.

The previous prime is 15525617. The next prime is 15525647. The reversal of 15525625 is 52652551.

It can be written as a sum of positive squares in 5 ways, for example, as 10106041 + 5419584 = 3179^2 + 2328^2 .

It is not a de Polignac number, because 15525625 - 2³ = 15525617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11796 + ... + 13045.

Almost surely, 2^15525625 is an apocalyptic number.

It is an amenable number.

15525625 is a deficient number, since it is larger than the sum of its proper divisors (3875977).

15525625 is an frugal number, since it uses more digits than its factorization.

15525625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24861 (or 24846 counting only the distinct ones).

The product of its digits is 15000, while the sum is 31.

The square root of 15525625 is about 3940.2569713154. The cubic root of 15525625 is about 249.4688724130.

The spelling of 15525625 in words is "fifteen million, five hundred twenty-five thousand, six hundred twenty-five".