206143199 has 4 divisors (see below), whose sum is σ = 208626936. Its totient is φ = 203659464.

The previous prime is 206143193. The next prime is 206143213. The reversal of 206143199 is 991341602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991341602 = 2 ⋅495670801.

It is a cyclic number.

It is not a de Polignac number, because 206143199 - 2⁴ = 206143183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206143193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241744 + ... + 1241909.

It is an arithmetic number, because the mean of its divisors is an integer number (52156734).

Almost surely, 2^206143199 is an apocalyptic number.

206143199 is a deficient number, since it is larger than the sum of its proper divisors (2483737).

206143199 is an equidigital number, since it uses as much as digits as its factorization.

206143199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483736.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 206143199 is about 14357.6878013140. The cubic root of 206143199 is about 590.7308753358.

The spelling of 206143199 in words is "two hundred six million, one hundred forty-three thousand, one hundred ninety-nine".