22204613 has 4 divisors (see below), whose sum is σ = 22401228. Its totient is φ = 22008000.

The previous prime is 22204583. The next prime is 22204621. The reversal of 22204613 is 31640222.

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 6340324 + 15864289 = 2518^2 + 3983^2 .

It is a cyclic number.

It is not a de Polignac number, because 22204613 - 2¹⁸ = 21942469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22204313) by changing a digit.

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, 98138 + ... + 98363.

It is an arithmetic number, because the mean of its divisors is an integer number (5600307).

Almost surely, 2^22204613 is an apocalyptic number.

It is an amenable number.

22204613 is a deficient number, since it is larger than the sum of its proper divisors (196615).

22204613 is a wasteful number, since it uses less digits than its factorization.

22204613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196614.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22204613 is about 4712.1770976906. The cubic root of 22204613 is about 281.0699411773.

Adding to 22204613 its reverse (31640222), we get a palindrome (53844835).

The spelling of 22204613 in words is "twenty-two million, two hundred four thousand, six hundred thirteen".