22204205 has 4 divisors (see below), whose sum is σ = 26645052. Its totient is φ = 17763360.

The previous prime is 22204151. The next prime is 22204207. The reversal of 22204205 is 50240222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50240222 = 2 ⋅25120111.

It can be written as a sum of positive squares in 2 ways, for example, as 6180196 + 16024009 = 2486^2 + 4003^2 .

It is not a de Polignac number, because 22204205 - 2⁸ = 22203949 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 (22204207) 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, 2220416 + ... + 2220425.

It is an arithmetic number, because the mean of its divisors is an integer number (6661263).

Almost surely, 2^22204205 is an apocalyptic number.

It is an amenable number.

22204205 is a deficient number, since it is larger than the sum of its proper divisors (4440847).

22204205 is an equidigital number, since it uses as much as digits as its factorization.

22204205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440846.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 22204205 is about 4712.1338054007. The cubic root of 22204205 is about 281.0682196545.

Adding to 22204205 its reverse (50240222), we get a palindrome (72444427).

The spelling of 22204205 in words is "twenty-two million, two hundred four thousand, two hundred five".