22224229 has 2 divisors, whose sum is σ = 22224230. Its totient is φ = 22224228.

The previous prime is 22224217. The next prime is 22224247. The reversal of 22224229 is 92242222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17623204 + 4601025 = 4198^2 + 2145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22224229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22224259) 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, 11112114 + 11112115.

It is an arithmetic number, because the mean of its divisors is an integer number (11112115).

Almost surely, 2^22224229 is an apocalyptic number.

It is an amenable number.

22224229 is a deficient number, since it is larger than the sum of its proper divisors (1).

22224229 is an equidigital number, since it uses as much as digits as its factorization.

22224229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 22224229 is about 4714.2580540314. The cubic root of 22224229 is about 281.1526844222.

The spelling of 22224229 in words is "twenty-two million, two hundred twenty-four thousand, two hundred twenty-nine".