525516625 has 8 divisors (see below), whose sum is σ = 655844904. Its totient is φ = 420413200.

The previous prime is 525516623. The next prime is 525516637. The reversal of 525516625 is 526615525.

It can be written as a sum of positive squares in 4 ways, for example, as 7817616 + 517699009 = 2796^2 + 22753^2 .

It is not a de Polignac number, because 525516625 - 2¹ = 525516623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525516623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2101942 + ... + 2102191.

It is an arithmetic number, because the mean of its divisors is an integer number (81980613).

Almost surely, 2^525516625 is an apocalyptic number.

It is an amenable number.

525516625 is a deficient number, since it is larger than the sum of its proper divisors (130328279).

525516625 is an equidigital number, since it uses as much as digits as its factorization.

525516625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204148 (or 4204138 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The square root of 525516625 is about 22924.1493844374. The cubic root of 525516625 is about 806.9788513647.

The spelling of 525516625 in words is "five hundred twenty-five million, five hundred sixteen thousand, six hundred twenty-five".