255231 has 20 divisors (see below), whose sum is σ = 400752. Its totient is φ = 161568.

The previous prime is 255217. The next prime is 255239. The reversal of 255231 is 132552.

It is a happy number.

It is not a de Polignac number, because 255231 - 2¹⁰ = 254207 is a prime.

It is a super-2 number, since 2×255231² = 130285726722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255239) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1795 + ... + 1931.

2²⁵⁵²³¹ is an apocalyptic number.

255231 is a deficient number, since it is larger than the sum of its proper divisors (145521).

255231 is a wasteful number, since it uses less digits than its factorization.

255231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 163 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 255231 is about 505.2039192247. The cubic root of 255231 is about 63.4323995916.

Adding to 255231 its reverse (132552), we get a palindrome (387783).

The spelling of 255231 in words is "two hundred fifty-five thousand, two hundred thirty-one".