22359221 has 2 divisors, whose sum is σ = 22359222. Its totient is φ = 22359220.

The previous prime is 22359193. The next prime is 22359251. The reversal of 22359221 is 12295322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 2235025 = 4486^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 22359221 - 2¹⁰ = 22358197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22359251) 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, 11179610 + 11179611.

It is an arithmetic number, because the mean of its divisors is an integer number (11179611).

Almost surely, 2^22359221 is an apocalyptic number.

It is an amenable number.

22359221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22359221 is an equidigital number, since it uses as much as digits as its factorization.

22359221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 22359221 is about 4728.5537958238. The cubic root of 22359221 is about 281.7207847805.

The spelling of 22359221 in words is "twenty-two million, three hundred fifty-nine thousand, two hundred twenty-one".