2209205 has 4 divisors (see below), whose sum is σ = 2651052. Its totient is φ = 1767360.

The previous prime is 2209189. The next prime is 2209213. The reversal of 2209205 is 5029022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1540081 + 669124 = 1241^2 + 818^2 .

It is not a de Polignac number, because 2209205 - 2⁴ = 2209189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220916 + ... + 220925.

It is an arithmetic number, because the mean of its divisors is an integer number (662763).

2^2209205 is an apocalyptic number.

It is an amenable number.

2209205 is a deficient number, since it is larger than the sum of its proper divisors (441847).

2209205 is an equidigital number, since it uses as much as digits as its factorization.

2209205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441846.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2209205 is about 1486.3394632452. The cubic root of 2209205 is about 130.2402853781.

The spelling of 2209205 in words is "two million, two hundred nine thousand, two hundred five".