222220279 has 2 divisors, whose sum is σ = 222220280. Its totient is φ = 222220278.

The previous prime is 222220253. The next prime is 222220289. The reversal of 222220279 is 972022222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222220279 - 2⁵ = 222220247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222220289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110139 + 111110140.

It is an arithmetic number, because the mean of its divisors is an integer number (111110140).

Almost surely, 2^222220279 is an apocalyptic number.

222220279 is a deficient number, since it is larger than the sum of its proper divisors (1).

222220279 is an equidigital number, since it uses as much as digits as its factorization.

222220279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 222220279 is about 14907.0546722013. The cubic root of 222220279 is about 605.7050987377.

The spelling of 222220279 in words is "two hundred twenty-two million, two hundred twenty thousand, two hundred seventy-nine".