225156 has 24 divisors (see below), whose sum is σ = 544320. Its totient is φ = 72352.

The previous prime is 225149. The next prime is 225157. The reversal of 225156 is 651522.

225156 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225157) by changing a digit.

225156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2²²⁵¹⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272160).

225156 is an abundant number, since it is smaller than the sum of its proper divisors (319164).

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

225156 is a wasteful number, since it uses less digits than its factorization.

225156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 681 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 225156 is about 474.5060589708. The cubic root of 225156 is about 60.8360733529.

Adding to 225156 its reverse (651522), we get a palindrome (876678).

The spelling of 225156 in words is "two hundred twenty-five thousand, one hundred fifty-six".