225613661125 has 32 divisors (see below), whose sum is σ = 284688338688. Its totient is φ = 178493560000.

The previous prime is 225613661083. The next prime is 225613661153. The reversal of 225613661125 is 521166316522.

It is not a de Polignac number, because 225613661125 - 2²⁵ = 225580106693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11188302 + ... + 11208448.

It is an arithmetic number, because the mean of its divisors is an integer number (8896510584).

Almost surely, 2^225613661125 is an apocalyptic number.

225613661125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225613661125 is a deficient number, since it is larger than the sum of its proper divisors (59074677563).

225613661125 is a wasteful number, since it uses less digits than its factorization.

225613661125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21150 (or 21140 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

Adding to 225613661125 its reverse (521166316522), we get a palindrome (746779977647).

The spelling of 225613661125 in words is "two hundred twenty-five billion, six hundred thirteen million, six hundred sixty-one thousand, one hundred twenty-five".