226638719 has 2 divisors, whose sum is σ = 226638720. Its totient is φ = 226638718.

The previous prime is 226638703. The next prime is 226638743. The reversal of 226638719 is 917836622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 226638719 - 2⁴ = 226638703 is a prime.

It is a super-2 number, since 2×226638719² = 102730217899921922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 226638719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226635719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113319359 + 113319360.

It is an arithmetic number, because the mean of its divisors is an integer number (113319360).

Almost surely, 2^226638719 is an apocalyptic number.

226638719 is a deficient number, since it is larger than the sum of its proper divisors (1).

226638719 is an equidigital number, since it uses as much as digits as its factorization.

226638719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 226638719 is about 15054.5248679591. The cubic root of 226638719 is about 609.6932247654.

The spelling of 226638719 in words is "two hundred twenty-six million, six hundred thirty-eight thousand, seven hundred nineteen".