22204505 has 4 divisors (see below), whose sum is σ = 26645412. Its totient is φ = 17763600.

The previous prime is 22204471. The next prime is 22204513. The reversal of 22204505 is 50540222.

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 9616201 + 12588304 = 3101^2 + 3548^2 .

It is not a de Polignac number, because 22204505 - 2⁸ = 22204249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2220446 + ... + 2220455.

It is an arithmetic number, because the mean of its divisors is an integer number (6661353).

Almost surely, 2^22204505 is an apocalyptic number.

It is an amenable number.

22204505 is a deficient number, since it is larger than the sum of its proper divisors (4440907).

22204505 is an equidigital number, since it uses as much as digits as its factorization.

22204505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440906.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22204505 is about 4712.1656380055. The cubic root of 22204505 is about 281.0694854821.

Adding to 22204505 its reverse (50540222), we get a palindrome (72744727).

The spelling of 22204505 in words is "twenty-two million, two hundred four thousand, five hundred five".