225399 has 4 divisors (see below), whose sum is σ = 300536. Its totient is φ = 150264.

The previous prime is 225383. The next prime is 225427. The reversal of 225399 is 993522.

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

It is not a de Polignac number, because 225399 - 2⁴ = 225383 is a prime.

It is a D-number.

It is a Duffinian number.

225399 is a lucky number.

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 225399.

It is not an unprimeable number, because it can be changed into a prime (225349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37564 + ... + 37569.

It is an arithmetic number, because the mean of its divisors is an integer number (75134).

2²²⁵³⁹⁹ is an apocalyptic number.

225399 is a deficient number, since it is larger than the sum of its proper divisors (75137).

225399 is an equidigital number, since it uses as much as digits as its factorization.

225399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75136.

The product of its digits is 4860, while the sum is 30.

The square root of 225399 is about 474.7620456608. The cubic root of 225399 is about 60.8579512965.

The spelling of 225399 in words is "two hundred twenty-five thousand, three hundred ninety-nine".