22223209 has 4 divisors (see below), whose sum is σ = 22250116. Its totient is φ = 22196304.

The previous prime is 22223207. The next prime is 22223219. The reversal of 22223209 is 90232222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90232222 = 2 ⋅45116111.

It can be written as a sum of positive squares in 2 ways, for example, as 9241600 + 12981609 = 3040^2 + 3603^2 .

It is a cyclic number.

It is not a de Polignac number, because 22223209 - 2¹ = 22223207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22223209.

It is not an unprimeable number, because it can be changed into a prime (22223207) 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, 12174 + ... + 13879.

It is an arithmetic number, because the mean of its divisors is an integer number (5562529).

Almost surely, 2^22223209 is an apocalyptic number.

It is an amenable number.

22223209 is a deficient number, since it is larger than the sum of its proper divisors (26907).

22223209 is an equidigital number, since it uses as much as digits as its factorization.

22223209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26906.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 22223209 is about 4714.1498703372. The cubic root of 22223209 is about 281.1483831087.

The spelling of 22223209 in words is "twenty-two million, two hundred twenty-three thousand, two hundred nine".