222220291 has 2 divisors, whose sum is σ = 222220292. Its totient is φ = 222220290.

The previous prime is 222220289. The next prime is 222220309. The reversal of 222220291 is 192022222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222220291 - 2¹ = 222220289 is a prime.

Together with 222220289, 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 (222220211) 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, 111110145 + 111110146.

It is an arithmetic number, because the mean of its divisors is an integer number (111110146).

Almost surely, 2^222220291 is an apocalyptic number.

222220291 is a deficient number, since it is larger than the sum of its proper divisors (1).

222220291 is an equidigital number, since it uses as much as digits as its factorization.

222220291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 222220291 is about 14907.0550746953. The cubic root of 222220291 is about 605.7051096405.

The spelling of 222220291 in words is "two hundred twenty-two million, two hundred twenty thousand, two hundred ninety-one".