222442217 has 2 divisors, whose sum is σ = 222442218. Its totient is φ = 222442216.

The previous prime is 222442201. The next prime is 222442237. The reversal of 222442217 is 712244222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160174336 + 62267881 = 12656^2 + 7891^2 .

It is a cyclic number.

It is not a de Polignac number, because 222442217 - 2⁴ = 222442201 is a prime.

It is not a weakly prime, because it can be changed into another prime (222442237) 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, 111221108 + 111221109.

It is an arithmetic number, because the mean of its divisors is an integer number (111221109).

Almost surely, 2^222442217 is an apocalyptic number.

It is an amenable number.

222442217 is a deficient number, since it is larger than the sum of its proper divisors (1).

222442217 is an equidigital number, since it uses as much as digits as its factorization.

222442217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 26.

The square root of 222442217 is about 14914.4968738473. The cubic root of 222442217 is about 605.9066768758.

Adding to 222442217 its reverse (712244222), we get a palindrome (934686439).

The spelling of 222442217 in words is "two hundred twenty-two million, four hundred forty-two thousand, two hundred seventeen".