222808217 has 2 divisors, whose sum is σ = 222808218. Its totient is φ = 222808216.

The previous prime is 222808181. The next prime is 222808219. The reversal of 222808217 is 712808222.

222808217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190329616 + 32478601 = 13796^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 222808217 - 2²⁰ = 221759641 is a prime.

Together with 222808219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222808219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111404108 + 111404109.

It is an arithmetic number, because the mean of its divisors is an integer number (111404109).

Almost surely, 2^222808217 is an apocalyptic number.

It is an amenable number.

222808217 is a deficient number, since it is larger than the sum of its proper divisors (1).

222808217 is an equidigital number, since it uses as much as digits as its factorization.

222808217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 222808217 is about 14926.7617720656. The cubic root of 222808217 is about 606.2388085651.

The spelling of 222808217 in words is "two hundred twenty-two million, eight hundred eight thousand, two hundred seventeen".