225171 has 12 divisors (see below), whose sum is σ = 329472. Its totient is φ = 148176.

The previous prime is 225167. The next prime is 225217. The reversal of 225171 is 171522.

It is not a de Polignac number, because 225171 - 2² = 225167 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225171.

It is not an unprimeable number, because it can be changed into a prime (225161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1045 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (27456).

2²²⁵¹⁷¹ is an apocalyptic number.

225171 is the 254-th nonagonal number.

225171 is a deficient number, since it is larger than the sum of its proper divisors (104301).

225171 is a wasteful number, since it uses less digits than its factorization.

225171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 327 counting only the distinct ones).

The product of its digits is 140, while the sum is 18.

The square root of 225171 is about 474.5218646174. The cubic root of 225171 is about 60.8374242990.

Adding to 225171 its reverse (171522), we get a palindrome (396693).

The spelling of 225171 in words is "two hundred twenty-five thousand, one hundred seventy-one".