2229209 has 4 divisors (see below), whose sum is σ = 2232804. Its totient is φ = 2225616.

The previous prime is 2229169. The next prime is 2229239. The reversal of 2229209 is 9029222.

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 1373584 + 855625 = 1172^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2229209 - 2¹⁶ = 2163673 is a prime.

It is a super-3 number, since 3×2229209³ = 33233311480832928987, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2229239) 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, 602 + ... + 2195.

It is an arithmetic number, because the mean of its divisors is an integer number (558201).

2^2229209 is an apocalyptic number.

It is an amenable number.

2229209 is a deficient number, since it is larger than the sum of its proper divisors (3595).

2229209 is an equidigital number, since it uses as much as digits as its factorization.

2229209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2229209 is about 1493.0535824276. The cubic root of 2229209 is about 130.6322065116.

The spelling of 2229209 in words is "two million, two hundred twenty-nine thousand, two hundred nine".