225099 has 20 divisors (see below), whose sum is σ = 385264. Its totient is φ = 128304.

The previous prime is 225089. The next prime is 225109. The reversal of 225099 is 990522.

It is an interprime number because it is at equal distance from previous prime (225089) and next prime (225109).

It is not a de Polignac number, because 225099 - 2⁵ = 225067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225099.

It is not an unprimeable number, because it can be changed into a prime (225079) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 369 + ... + 765.

2²²⁵⁰⁹⁹ is an apocalyptic number.

225099 is a deficient number, since it is larger than the sum of its proper divisors (160165).

225099 is an equidigital number, since it uses as much as digits as its factorization.

225099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 225099 is about 474.4459927115. The cubic root of 225099 is about 60.8309392106.

The spelling of 225099 in words is "two hundred twenty-five thousand, ninety-nine".