2222809 has 2 divisors, whose sum is σ = 2222810. Its totient is φ = 2222808.

The previous prime is 2222783. The next prime is 2222819. The reversal of 2222809 is 9082222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 635209 = 1260^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222809 - 2¹⁷ = 2091737 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 2⁵ + 2¹⁰ + 2¹⁶ + 8⁷ + 0 + 9⁵ .

It is not a weakly prime, because it can be changed into another prime (2222819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111404 + 1111405.

It is an arithmetic number, because the mean of its divisors is an integer number (1111405).

2^2222809 is an apocalyptic number.

It is an amenable number.

2222809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222809 is an equidigital number, since it uses as much as digits as its factorization.

2222809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2222809 is about 1490.9087832594. The cubic root of 2222809 is about 130.5070728148.

The spelling of 2222809 in words is "two million, two hundred twenty-two thousand, eight hundred nine".