225870 has 16 divisors (see below), whose sum is σ = 542160. Its totient is φ = 60224.

The previous prime is 225859. The next prime is 225871. The reversal of 225870 is 78522.

It is a plaindrome in base 11.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 225870.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225870.

It is not an unprimeable number, because it can be changed into a prime (225871) 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, 3735 + ... + 3794.

It is an arithmetic number, because the mean of its divisors is an integer number (33885).

2²²⁵⁸⁷⁰ is an apocalyptic number.

225870 is an abundant number, since it is smaller than the sum of its proper divisors (316290).

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

225870 is a wasteful number, since it uses less digits than its factorization.

225870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7539.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 225870 is about 475.2578247646. The cubic root of 225870 is about 60.9003119583.

The spelling of 225870 in words is "two hundred twenty-five thousand, eight hundred seventy".