2226991309 has 2 divisors, whose sum is σ = 2226991310. Its totient is φ = 2226991308.

The previous prime is 2226991303. The next prime is 2226991331. The reversal of 2226991309 is 9031996222.

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., 1402727209 + 824264100 = 37453^2 + 28710^2 .

It is a cyclic number.

It is not a de Polignac number, because 2226991309 - 2⁷ = 2226991181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2226991303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1113495654 + 1113495655.

It is an arithmetic number, because the mean of its divisors is an integer number (1113495655).

Almost surely, 2^2226991309 is an apocalyptic number.

It is an amenable number.

2226991309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2226991309 is an equidigital number, since it uses as much as digits as its factorization.

2226991309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 2226991309 is about 47191.0087728584. The cubic root of 2226991309 is about 1305.8887305562. Note that the first 3 decimals are identical.

The spelling of 2226991309 in words is "two billion, two hundred twenty-six million, nine hundred ninety-one thousand, three hundred nine".