222206849 has 2 divisors, whose sum is σ = 222206850. Its totient is φ = 222206848.

The previous prime is 222206833. The next prime is 222206857. The reversal of 222206849 is 948602222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142372624 + 79834225 = 11932^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 222206849 - 2⁴ = 222206833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (222206819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111103424 + 111103425.

It is an arithmetic number, because the mean of its divisors is an integer number (111103425).

Almost surely, 2^222206849 is an apocalyptic number.

It is an amenable number.

222206849 is a deficient number, since it is larger than the sum of its proper divisors (1).

222206849 is an equidigital number, since it uses as much as digits as its factorization.

222206849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 222206849 is about 14906.6042075316. The cubic root of 222206849 is about 605.6928964559.

The spelling of 222206849 in words is "two hundred twenty-two million, two hundred six thousand, eight hundred forty-nine".