255228 has 12 divisors (see below), whose sum is σ = 595560. Its totient is φ = 85072.

The previous prime is 255217. The next prime is 255239. The reversal of 255228 is 822552.

It is an interprime number because it is at equal distance from previous prime (255217) and next prime (255239).

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 255198 and 255207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10623 + ... + 10646.

It is an arithmetic number, because the mean of its divisors is an integer number (49630).

2²⁵⁵²²⁸ is an apocalyptic number.

It is an amenable number.

255228 is an abundant number, since it is smaller than the sum of its proper divisors (340332).

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

255228 is a wasteful number, since it uses less digits than its factorization.

255228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21276 (or 21274 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 255228 is about 505.2009501179. The cubic root of 255228 is about 63.4321510612.

It can be divided in two parts, 25 and 5228, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 255228 in words is "two hundred fifty-five thousand, two hundred twenty-eight".