225389 has 4 divisors (see below), whose sum is σ = 226524. Its totient is φ = 224256.

The previous prime is 225383. The next prime is 225427. The reversal of 225389 is 983522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 209764 + 15625 = 458^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 225389 - 2⁴ = 225373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225383) 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, 182 + ... + 695.

It is an arithmetic number, because the mean of its divisors is an integer number (56631).

2²²⁵³⁸⁹ is an apocalyptic number.

It is an amenable number.

225389 is a deficient number, since it is larger than the sum of its proper divisors (1135).

225389 is an equidigital number, since it uses as much as digits as its factorization.

225389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134.

The product of its digits is 4320, while the sum is 29.

The square root of 225389 is about 474.7515139523. The cubic root of 225389 is about 60.8570512799.

The spelling of 225389 in words is "two hundred twenty-five thousand, three hundred eighty-nine".