22204321 has 2 divisors, whose sum is σ = 22204322. Its totient is φ = 22204320.

The previous prime is 22204313. The next prime is 22204373. The reversal of 22204321 is 12340222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 5688225 = 4064^2 + 2385^2 .

It is a cyclic number.

It is not a de Polignac number, because 22204321 - 2³ = 22204313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22204295 and 22204304.

It is not a weakly prime, because it can be changed into another prime (22204381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11102160 + 11102161.

It is an arithmetic number, because the mean of its divisors is an integer number (11102161).

Almost surely, 2^22204321 is an apocalyptic number.

It is an amenable number.

22204321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22204321 is an equidigital number, since it uses as much as digits as its factorization.

22204321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22204321 is about 4712.1461140334. The cubic root of 22204321 is about 281.0687091092.

Adding to 22204321 its reverse (12340222), we get a palindrome (34544543).

The spelling of 22204321 in words is "twenty-two million, two hundred four thousand, three hundred twenty-one".