2220209 has 2 divisors, whose sum is σ = 2220210. Its totient is φ = 2220208.

The previous prime is 2220203. The next prime is 2220263. The reversal of 2220209 is 9020222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2146225 + 73984 = 1465^2 + 272^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220209 - 2⁴ = 2220193 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2220203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110104 + 1110105.

It is an arithmetic number, because the mean of its divisors is an integer number (1110105).

2^2220209 is an apocalyptic number.

It is an amenable number.

2220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220209 is an equidigital number, since it uses as much as digits as its factorization.

2220209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2220209 is about 1490.0365767323. The cubic root of 2220209 is about 130.4561686399.

The spelling of 2220209 in words is "two million, two hundred twenty thousand, two hundred nine".