225790 has 16 divisors (see below), whose sum is σ = 413712. Its totient is φ = 88704.

The previous prime is 225781. The next prime is 225809. The reversal of 225790 is 97522.

It is a super-2 number, since 2×225790² = 101962248200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

225790 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502 + ... + 838.

It is an arithmetic number, because the mean of its divisors is an integer number (25857).

2²²⁵⁷⁹⁰ is an apocalyptic number.

225790 is a deficient number, since it is larger than the sum of its proper divisors (187922).

225790 is a wasteful number, since it uses less digits than its factorization.

225790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 225790 is about 475.1736524682. The cubic root of 225790 is about 60.8931210959.

The spelling of 225790 in words is "two hundred twenty-five thousand, seven hundred ninety".