225579697928 has 36 divisors (see below), whose sum is σ = 458035660215. Its totient is φ = 104105646528.

The previous prime is 225579697913. The next prime is 225579697943. The reversal of 225579697928 is 829796975522.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (225579697913) and next prime (225579697943).

It can be written as a sum of positive squares in 5 ways, for example, as 41282925124 + 184296772804 = 203182^2 + 429298^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335842.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17457326 + ... + 17470242.

Almost surely, 2^225579697928 is an apocalyptic number.

It is an amenable number.

225579697928 is an abundant number, since it is smaller than the sum of its proper divisors (232455962287).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225579697928 is an frugal number, since it uses more digits than its factorization.

225579697928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25866 (or 12932 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 71.

The spelling of 225579697928 in words is "two hundred twenty-five billion, five hundred seventy-nine million, six hundred ninety-seven thousand, nine hundred twenty-eight".