225571525 has 6 divisors (see below), whose sum is σ = 279708722. Its totient is φ = 180457200.

The previous prime is 225571523. The next prime is 225571529. The reversal of 225571525 is 525175522.

It can be written as a sum of positive squares in 3 ways, for example, as 29095236 + 196476289 = 5394^2 + 14017^2 .

It is not a de Polignac number, because 225571525 - 2¹ = 225571523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225571523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4511406 + ... + 4511455.

Almost surely, 2^225571525 is an apocalyptic number.

225571525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225571525 is a deficient number, since it is larger than the sum of its proper divisors (54137197).

225571525 is an equidigital number, since it uses as much as digits as its factorization.

225571525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9022871 (or 9022866 counting only the distinct ones).

The product of its digits is 35000, while the sum is 34.

The square root of 225571525 is about 15019.0387508655. The cubic root of 225571525 is about 608.7347464298.

The spelling of 225571525 in words is "two hundred twenty-five million, five hundred seventy-one thousand, five hundred twenty-five".