225542 has 4 divisors (see below), whose sum is σ = 338316. Its totient is φ = 112770.

The previous prime is 225529. The next prime is 225569. The reversal of 225542 is 245522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245522 = 2 ⋅122761.

It is a nialpdrome in base 12.

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 225542.

It is an unprimeable number.

225542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56384 + ... + 56387.

It is an arithmetic number, because the mean of its divisors is an integer number (84579).

2²²⁵⁵⁴² is an apocalyptic number.

225542 is a deficient number, since it is larger than the sum of its proper divisors (112774).

225542 is a wasteful number, since it uses less digits than its factorization.

225542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112773.

The product of its digits is 800, while the sum is 20.

The square root of 225542 is about 474.9126235425. The cubic root of 225542 is about 60.8708186225.

Subtracting from 225542 its sum of digits (20), we obtain a palindrome (225522).

It can be divided in two parts, 225 and 542, that added together give a palindrome (767).

The spelling of 225542 in words is "two hundred twenty-five thousand, five hundred forty-two".