199204231 has 2 divisors, whose sum is σ = 199204232. Its totient is φ = 199204230.

The previous prime is 199204207. The next prime is 199204301. The reversal of 199204231 is 132402991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199204231 - 2¹¹ = 199202183 is a prime.

It is a super-2 number, since 2×199204231² = 79364651296602722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199204193 and 199204202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199214231) 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, 99602115 + 99602116.

It is an arithmetic number, because the mean of its divisors is an integer number (99602116).

Almost surely, 2^199204231 is an apocalyptic number.

199204231 is a deficient number, since it is larger than the sum of its proper divisors (1).

199204231 is an equidigital number, since it uses as much as digits as its factorization.

199204231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 199204231 is about 14113.9728992230. The cubic root of 199204231 is about 584.0269024559.

The spelling of 199204231 in words is "one hundred ninety-nine million, two hundred four thousand, two hundred thirty-one".