2204309 has 4 divisors (see below), whose sum is σ = 2255616. Its totient is φ = 2153004.

The previous prime is 2204273. The next prime is 2204327. The reversal of 2204309 is 9034022.

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.

It is a cyclic number.

It is not a de Polignac number, because 2204309 - 2²⁰ = 1155733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2204369) 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, 25589 + ... + 25674.

It is an arithmetic number, because the mean of its divisors is an integer number (563904).

2^2204309 is an apocalyptic number.

It is an amenable number.

2204309 is a deficient number, since it is larger than the sum of its proper divisors (51307).

2204309 is an equidigital number, since it uses as much as digits as its factorization.

2204309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51306.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2204309 is about 1484.6915504575. The cubic root of 2204309 is about 130.1440021643.

The spelling of 2204309 in words is "two million, two hundred four thousand, three hundred nine".