222218879 has 2 divisors, whose sum is σ = 222218880. Its totient is φ = 222218878.

The previous prime is 222218869. The next prime is 222218897. The reversal of 222218879 is 978812222.

Together with next prime (222218897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222218879 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 (222218809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111109439 + 111109440.

It is an arithmetic number, because the mean of its divisors is an integer number (111109440).

Almost surely, 2^222218879 is an apocalyptic number.

222218879 is a deficient number, since it is larger than the sum of its proper divisors (1).

222218879 is an equidigital number, since it uses as much as digits as its factorization.

222218879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 222218879 is about 14907.0077144945. The cubic root of 222218879 is about 605.7038267432.

The spelling of 222218879 in words is "two hundred twenty-two million, two hundred eighteen thousand, eight hundred seventy-nine".