222216997 has 2 divisors, whose sum is σ = 222216998. Its totient is φ = 222216996.

The previous prime is 222216941. The next prime is 222217031. The reversal of 222216997 is 799612222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151757761 + 70459236 = 12319^2 + 8394^2 .

It is a cyclic number.

It is not a de Polignac number, because 222216997 - 2¹⁵ = 222184229 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 (222216697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111108498 + 111108499.

It is an arithmetic number, because the mean of its divisors is an integer number (111108499).

Almost surely, 2^222216997 is an apocalyptic number.

It is an amenable number.

222216997 is a deficient number, since it is larger than the sum of its proper divisors (1).

222216997 is an equidigital number, since it uses as much as digits as its factorization.

222216997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 222216997 is about 14906.9445896870. The cubic root of 222216997 is about 605.7021168107.

The spelling of 222216997 in words is "two hundred twenty-two million, two hundred sixteen thousand, nine hundred ninety-seven".