225545 has 8 divisors (see below), whose sum is σ = 274560. Its totient is φ = 177840.

The previous prime is 225529. The next prime is 225569. The reversal of 225545 is 545522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225545 - 2⁴ = 225529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225545.

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 225545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110 + ... + 680.

It is an arithmetic number, because the mean of its divisors is an integer number (34320).

2²²⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

225545 is a deficient number, since it is larger than the sum of its proper divisors (49015).

225545 is an equidigital number, since it uses as much as digits as its factorization.

225545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its digits is 2000, while the sum is 23.

The square root of 225545 is about 474.9157820077. The cubic root of 225545 is about 60.8710885082.

Subtracting from 225545 its sum of digits (23), we obtain a palindrome (225522).

It can be divided in two parts, 2255 and 45, that multiplied together give a triangular number (101475 = T₄₅₀).

The spelling of 225545 in words is "two hundred twenty-five thousand, five hundred forty-five".