225543 has 4 divisors (see below), whose sum is σ = 300728. Its totient is φ = 150360.

The previous prime is 225529. The next prime is 225569. The reversal of 225543 is 345522.

225543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225543 - 2⁴ = 225527 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 2¹³ + 5⁷ + 5⁷ + 4 + 3¹⁰ .

It is a D-number.

It is a Duffinian number.

225543 is a lucky number.

It is a plaindrome in base 11.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37588 + ... + 37593.

It is an arithmetic number, because the mean of its divisors is an integer number (75182).

2²²⁵⁵⁴³ is an apocalyptic number.

225543 is a deficient number, since it is larger than the sum of its proper divisors (75185).

225543 is an equidigital number, since it uses as much as digits as its factorization.

225543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75184.

The product of its digits is 1200, while the sum is 21.

The square root of 225543 is about 474.9136763666. The cubic root of 225543 is about 60.8709085847.

Subtracting from 225543 its sum of digits (21), we obtain a palindrome (225522).

It can be divided in two parts, 22 and 5543, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 225543 in words is "two hundred twenty-five thousand, five hundred forty-three".