225307128 has 16 divisors (see below), whose sum is σ = 563267880. Its totient is φ = 75102368.

The previous prime is 225307123. The next prime is 225307139. The reversal of 225307128 is 821703522.

225307128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 225307095 and 225307104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225307123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4693875 + ... + 4693922.

Almost surely, 2^225307128 is an apocalyptic number.

It is an amenable number.

225307128 is an abundant number, since it is smaller than the sum of its proper divisors (337960752).

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

225307128 is a wasteful number, since it uses less digits than its factorization.

225307128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9387806 (or 9387802 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 225307128 is about 15010.2341087673. The cubic root of 225307128 is about 608.4968166275.

The spelling of 225307128 in words is "two hundred twenty-five million, three hundred seven thousand, one hundred twenty-eight".