222231979 has 2 divisors, whose sum is σ = 222231980. Its totient is φ = 222231978.

The previous prime is 222231943. The next prime is 222232051. The reversal of 222231979 is 979132222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222231979 - 2⁷ = 222231851 is a prime.

It is not a weakly prime, because it can be changed into another prime (222232979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111115989 + 111115990.

It is an arithmetic number, because the mean of its divisors is an integer number (111115990).

Almost surely, 2^222231979 is an apocalyptic number.

222231979 is a deficient number, since it is larger than the sum of its proper divisors (1).

222231979 is an equidigital number, since it uses as much as digits as its factorization.

222231979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 222231979 is about 14907.4470986819. The cubic root of 222231979 is about 605.7157287686.

The spelling of 222231979 in words is "two hundred twenty-two million, two hundred thirty-one thousand, nine hundred seventy-nine".