199865227 has 2 divisors, whose sum is σ = 199865228. Its totient is φ = 199865226.

The previous prime is 199865207. The next prime is 199865269. The reversal of 199865227 is 722568991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199865227 - 2¹¹ = 199863179 is a prime.

It is a super-2 number, since 2×199865227² = 79892217927523058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199865207) 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, 99932613 + 99932614.

It is an arithmetic number, because the mean of its divisors is an integer number (99932614).

Almost surely, 2^199865227 is an apocalyptic number.

199865227 is a deficient number, since it is larger than the sum of its proper divisors (1).

199865227 is an equidigital number, since it uses as much as digits as its factorization.

199865227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 199865227 is about 14137.3698756169. The cubic root of 199865227 is about 584.6721585778.

The spelling of 199865227 in words is "one hundred ninety-nine million, eight hundred sixty-five thousand, two hundred twenty-seven".