2273209 has 2 divisors, whose sum is σ = 2273210. Its totient is φ = 2273208.

The previous prime is 2273171. The next prime is 2273213. The reversal of 2273209 is 9023722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 327184 = 1395^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 2273209 - 2¹¹ = 2271161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2273239) 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, 1136604 + 1136605.

It is an arithmetic number, because the mean of its divisors is an integer number (1136605).

2^2273209 is an apocalyptic number.

It is an amenable number.

2273209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2273209 is an equidigital number, since it uses as much as digits as its factorization.

2273209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2273209 is about 1507.7164852849. The cubic root of 2273209 is about 131.4860833340.

The spelling of 2273209 in words is "two million, two hundred seventy-three thousand, two hundred nine".