225570 has 32 divisors (see below), whose sum is σ = 554112. Its totient is φ = 58752.

The previous prime is 225569. The next prime is 225581. The reversal of 225570 is 75522.

225570 is nontrivially palindromic in base 9.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2139 + ... + 2241.

It is an arithmetic number, because the mean of its divisors is an integer number (17316).

2²²⁵⁵⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277056).

225570 is an abundant number, since it is smaller than the sum of its proper divisors (328542).

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

225570 is a wasteful number, since it uses less digits than its factorization.

225570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 225570 is about 474.9421017345. The cubic root of 225570 is about 60.8733374622.

The spelling of 225570 in words is "two hundred twenty-five thousand, five hundred seventy".