199932281 has 2 divisors, whose sum is σ = 199932282. Its totient is φ = 199932280.

The previous prime is 199932263. The next prime is 199932283. The reversal of 199932281 is 182239991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135932281 + 64000000 = 11659^2 + 8000^2 .

It is a cyclic number.

It is not a de Polignac number, because 199932281 - 2¹⁰ = 199931257 is a prime.

It is a super-2 number, since 2×199932281² = 79945833971725922, which contains 22 as substring.

Together with 199932283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199932283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99966140 + 99966141.

It is an arithmetic number, because the mean of its divisors is an integer number (99966141).

Almost surely, 2^199932281 is an apocalyptic number.

It is an amenable number.

199932281 is a deficient number, since it is larger than the sum of its proper divisors (1).

199932281 is an equidigital number, since it uses as much as digits as its factorization.

199932281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The square root of 199932281 is about 14139.7411928224. The cubic root of 199932281 is about 584.7375363392.

The spelling of 199932281 in words is "one hundred ninety-nine million, nine hundred thirty-two thousand, two hundred eighty-one".