225438 has 8 divisors (see below), whose sum is σ = 450888. Its totient is φ = 75144.

The previous prime is 225431. The next prime is 225457. The reversal of 225438 is 834522.

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

225438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225431) 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, 18781 + ... + 18792.

It is an arithmetic number, because the mean of its divisors is an integer number (56361).

2²²⁵⁴³⁸ is an apocalyptic number.

225438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225438 is a wasteful number, since it uses less digits than its factorization.

225438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37578.

The product of its digits is 1920, while the sum is 24.

The square root of 225438 is about 474.8031170917. The cubic root of 225438 is about 60.8614611068.

It can be divided in two parts, 22 and 5438, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 225438 in words is "two hundred twenty-five thousand, four hundred thirty-eight".