225228 has 18 divisors (see below), whose sum is σ = 529396. Its totient is φ = 74528.

The previous prime is 225227. The next prime is 225241. The reversal of 225228 is 822522.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (225221) 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, 1576 + ... + 1712.

225228 is a Friedman number, since it can be written as 822^2/(5-2), using all its digits and the basic arithmetic operations.

2²²⁵²²⁸ is an apocalyptic number.

It is an amenable number.

225228 is an abundant number, since it is smaller than the sum of its proper divisors (304168).

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

225228 is a wasteful number, since it uses less digits than its factorization.

225228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 142 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 225228 is about 474.5819212739. The cubic root of 225228 is about 60.8425573470.

The spelling of 225228 in words is "two hundred twenty-five thousand, two hundred twenty-eight".