222449999 has 2 divisors, whose sum is σ = 222450000. Its totient is φ = 222449998.

The previous prime is 222449987. The next prime is 222450023. The reversal of 222449999 is 999944222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222449999 - 2²⁰ = 221401423 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222449939) 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, 111224999 + 111225000.

It is an arithmetic number, because the mean of its divisors is an integer number (111225000).

Almost surely, 2^222449999 is an apocalyptic number.

222449999 is a deficient number, since it is larger than the sum of its proper divisors (1).

222449999 is an equidigital number, since it uses as much as digits as its factorization.

222449999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The square root of 222449999 is about 14914.7577586765. The cubic root of 222449999 is about 605.9137425471.

The spelling of 222449999 in words is "two hundred twenty-two million, four hundred forty-nine thousand, nine hundred ninety-nine".