225549 has 12 divisors (see below), whose sum is σ = 343200. Its totient is φ = 142344.

The previous prime is 225529. The next prime is 225569. The reversal of 225549 is 945522.

225549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (225529) and next prime (225569).

It is not a de Polignac number, because 225549 - 2⁹ = 225037 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

225549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489 + ... + 830.

It is an arithmetic number, because the mean of its divisors is an integer number (28600).

2²²⁵⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

225549 is a deficient number, since it is larger than the sum of its proper divisors (117651).

225549 is a wasteful number, since it uses less digits than its factorization.

225549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1341 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 225549 is about 474.9199932620. The cubic root of 225549 is about 60.8714483520.

Subtracting from 225549 its sum of digits (27), we obtain a palindrome (225522).

It can be divided in two parts, 2255 and 49, that added together give a square (2304 = 48²).

The spelling of 225549 in words is "two hundred twenty-five thousand, five hundred forty-nine".