225231 has 8 divisors (see below), whose sum is σ = 302640. Its totient is φ = 148992.

The previous prime is 225227. The next prime is 225241. The reversal of 225231 is 132522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225231 - 2² = 225227 is a prime.

It is a super-2 number, since 2×225231² = 101458006722, which contains 22 as substring.

225231 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 225231.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 385 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (37830).

2²²⁵²³¹ is an apocalyptic number.

225231 is a deficient number, since it is larger than the sum of its proper divisors (77409).

225231 is a wasteful number, since it uses less digits than its factorization.

225231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585.

The product of its digits is 120, while the sum is 15.

The square root of 225231 is about 474.5850819400. The cubic root of 225231 is about 60.8428274834.

Adding to 225231 its reverse (132522), we get a palindrome (357753).

It can be divided in two parts, 22 and 5231, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 225231 in words is "two hundred twenty-five thousand, two hundred thirty-one".