225256128 has 56 divisors (see below), whose sum is σ = 597133680. Its totient is φ = 74941440.

The previous prime is 225256127. The next prime is 225256139. The reversal of 225256128 is 821652522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (225256127) 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, 156918 + ... + 158346.

Almost surely, 2^225256128 is an apocalyptic number.

It is an amenable number.

225256128 is an abundant number, since it is smaller than the sum of its proper divisors (371877552).

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

225256128 is a wasteful number, since it uses less digits than its factorization.

225256128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265 (or 2255 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 225256128 is about 15008.5351716948. The cubic root of 225256128 is about 608.4509005192.

The spelling of 225256128 in words is "two hundred twenty-five million, two hundred fifty-six thousand, one hundred twenty-eight".