225598309 has 4 divisors (see below), whose sum is σ = 225645280. Its totient is φ = 225551340.

The previous prime is 225598301. The next prime is 225598319. The reversal of 225598309 is 903895522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 903895522 = 2 ⋅451947761.

It is a cyclic number.

It is not a de Polignac number, because 225598309 - 2³ = 225598301 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 (225598301) 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, 15339 + ... + 26200.

It is an arithmetic number, because the mean of its divisors is an integer number (56411320).

Almost surely, 2^225598309 is an apocalyptic number.

It is an amenable number.

225598309 is a deficient number, since it is larger than the sum of its proper divisors (46971).

225598309 is an equidigital number, since it uses as much as digits as its factorization.

225598309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46970.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 225598309 is about 15019.9303926483. The cubic root of 225598309 is about 608.7588388711.

The spelling of 225598309 in words is "two hundred twenty-five million, five hundred ninety-eight thousand, three hundred nine".