199530281 has 2 divisors, whose sum is σ = 199530282. Its totient is φ = 199530280.

The previous prime is 199530259. The next prime is 199530293. The reversal of 199530281 is 182035991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119159056 + 80371225 = 10916^2 + 8965^2 .

It is a cyclic number.

It is not a de Polignac number, because 199530281 - 2⁶ = 199530217 is a prime.

It is a super-2 number, since 2×199530281² = 79624666071877922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199530781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99765140 + 99765141.

It is an arithmetic number, because the mean of its divisors is an integer number (99765141).

Almost surely, 2^199530281 is an apocalyptic number.

It is an amenable number.

199530281 is a deficient number, since it is larger than the sum of its proper divisors (1).

199530281 is an equidigital number, since it uses as much as digits as its factorization.

199530281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 199530281 is about 14125.5187869331. The cubic root of 199530281 is about 584.3453665319.

The spelling of 199530281 in words is "one hundred ninety-nine million, five hundred thirty thousand, two hundred eighty-one".