199582081 has 2 divisors, whose sum is σ = 199582082. Its totient is φ = 199582080.

The previous prime is 199582067. The next prime is 199582087. The reversal of 199582081 is 180285991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100400400 + 99181681 = 10020^2 + 9959^2 .

It is a cyclic number.

It is not a de Polignac number, because 199582081 - 2⁷ = 199581953 is a prime.

It is a super-2 number, since 2×199582081² = 79666014112581122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199582087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99791040 + 99791041.

It is an arithmetic number, because the mean of its divisors is an integer number (99791041).

Almost surely, 2^199582081 is an apocalyptic number.

It is an amenable number.

199582081 is a deficient number, since it is larger than the sum of its proper divisors (1).

199582081 is an equidigital number, since it uses as much as digits as its factorization.

199582081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 199582081 is about 14127.3522289210. The cubic root of 199582081 is about 584.3959294019.

The spelling of 199582081 in words is "one hundred ninety-nine million, five hundred eighty-two thousand, eighty-one".