199223851 has 2 divisors, whose sum is σ = 199223852. Its totient is φ = 199223850.

The previous prime is 199223831. The next prime is 199223863. The reversal of 199223851 is 158322991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199223851 - 2²³ = 190835243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199223831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99611925 + 99611926.

It is an arithmetic number, because the mean of its divisors is an integer number (99611926).

Almost surely, 2^199223851 is an apocalyptic number.

199223851 is a deficient number, since it is larger than the sum of its proper divisors (1).

199223851 is an equidigital number, since it uses as much as digits as its factorization.

199223851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 199223851 is about 14114.6679379998. The cubic root of 199223851 is about 584.0460757964.

The spelling of 199223851 in words is "one hundred ninety-nine million, two hundred twenty-three thousand, eight hundred fifty-one".