199550951 has 2 divisors, whose sum is σ = 199550952. Its totient is φ = 199550950.

The previous prime is 199550927. The next prime is 199550971. The reversal of 199550951 is 159055991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199550951 - 2⁶ = 199550887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199550971) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99775475 + 99775476.

It is an arithmetic number, because the mean of its divisors is an integer number (99775476).

Almost surely, 2^199550951 is an apocalyptic number.

199550951 is a deficient number, since it is larger than the sum of its proper divisors (1).

199550951 is an equidigital number, since it uses as much as digits as its factorization.

199550951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91125, while the sum is 44.

The square root of 199550951 is about 14126.2504225290. The cubic root of 199550951 is about 584.3655439232.

The spelling of 199550951 in words is "one hundred ninety-nine million, five hundred fifty thousand, nine hundred fifty-one".