225166 has 4 divisors (see below), whose sum is σ = 337752. Its totient is φ = 112582.

The previous prime is 225163. The next prime is 225167. The reversal of 225166 is 661522.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 56290 + ... + 56293.

It is an arithmetic number, because the mean of its divisors is an integer number (84438).

2²²⁵¹⁶⁶ is an apocalyptic number.

225166 is a deficient number, since it is larger than the sum of its proper divisors (112586).

225166 is a wasteful number, since it uses less digits than its factorization.

225166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112585.

The product of its digits is 720, while the sum is 22.

The square root of 225166 is about 474.5165961270. The cubic root of 225166 is about 60.8369739903.

Adding to 225166 its reverse (661522), we get a palindrome (886688).

It can be divided in two parts, 22516 and 6, that added together give a palindrome (22522).

The spelling of 225166 in words is "two hundred twenty-five thousand, one hundred sixty-six".