224221979 has 2 divisors, whose sum is σ = 224221980. Its totient is φ = 224221978.

The previous prime is 224221973. The next prime is 224222041. The reversal of 224221979 is 979122422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 224221979 - 2²⁴ = 207444763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (224221973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112110989 + 112110990.

It is an arithmetic number, because the mean of its divisors is an integer number (112110990).

Almost surely, 2^224221979 is an apocalyptic number.

224221979 is a deficient number, since it is larger than the sum of its proper divisors (1).

224221979 is an equidigital number, since it uses as much as digits as its factorization.

224221979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 224221979 is about 14974.0435086853. The cubic root of 224221979 is about 607.5183409367.

The spelling of 224221979 in words is "two hundred twenty-four million, two hundred twenty-one thousand, nine hundred seventy-nine".