222212009 has 2 divisors, whose sum is σ = 222212010. Its totient is φ = 222212008.

The previous prime is 222211943. The next prime is 222212063. The reversal of 222212009 is 900212222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168922009 + 53290000 = 12997^2 + 7300^2 .

It is a cyclic number.

It is not a de Polignac number, because 222212009 - 2²⁰ = 221163433 is a prime.

It is not a weakly prime, because it can be changed into another prime (222212209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111106004 + 111106005.

It is an arithmetic number, because the mean of its divisors is an integer number (111106005).

Almost surely, 2^222212009 is an apocalyptic number.

It is an amenable number.

222212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

222212009 is an equidigital number, since it uses as much as digits as its factorization.

222212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 222212009 is about 14906.7772841751. Note that the first 3 decimals coincide. The cubic root of 222212009 is about 605.6975848070.

The spelling of 222212009 in words is "two hundred twenty-two million, two hundred twelve thousand, nine".