225442 has 8 divisors (see below), whose sum is σ = 386496. Its totient is φ = 96612.

The previous prime is 225431. The next prime is 225457. The reversal of 225442 is 244522.

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

It is an unprimeable number.

225442 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 in 3 ways as a sum of consecutive naturals, for example, 8038 + ... + 8065.

It is an arithmetic number, because the mean of its divisors is an integer number (48312).

2²²⁵⁴⁴² is an apocalyptic number.

225442 is a deficient number, since it is larger than the sum of its proper divisors (161054).

225442 is a wasteful number, since it uses less digits than its factorization.

225442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16112.

The product of its digits is 640, while the sum is 19.

The square root of 225442 is about 474.8073293453. The cubic root of 225442 is about 60.8618210645.

Adding to 225442 its reverse (244522), we get a palindrome (469964).

The spelling of 225442 in words is "two hundred twenty-five thousand, four hundred forty-two".