222051217 has 2 divisors, whose sum is σ = 222051218. Its totient is φ = 222051216.

The previous prime is 222051191. The next prime is 222051239. The reversal of 222051217 is 712150222.

It is an a-pointer prime, because the next prime (222051239) can be obtained adding 222051217 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218330176 + 3721041 = 14776^2 + 1929^2 .

It is a cyclic number.

It is not a de Polignac number, because 222051217 - 2¹⁵ = 222018449 is a prime.

It is not a weakly prime, because it can be changed into another prime (222051257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111025608 + 111025609.

It is an arithmetic number, because the mean of its divisors is an integer number (111025609).

Almost surely, 2^222051217 is an apocalyptic number.

It is an amenable number.

222051217 is a deficient number, since it is larger than the sum of its proper divisors (1).

222051217 is an equidigital number, since it uses as much as digits as its factorization.

222051217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 222051217 is about 14901.3830566159. The cubic root of 222051217 is about 605.5514558517.

The spelling of 222051217 in words is "two hundred twenty-two million, fifty-one thousand, two hundred seventeen".