206205113 has 4 divisors (see below), whose sum is σ = 211234548. Its totient is φ = 201175680.

The previous prime is 206205091. The next prime is 206205133. The reversal of 206205113 is 311502602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17197609 + 189007504 = 4147^2 + 13748^2 .

It is a cyclic number.

It is not a de Polignac number, because 206205113 - 2⁶ = 206205049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206205133) 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 in 3 ways as a sum of consecutive naturals, for example, 2514656 + ... + 2514737.

It is an arithmetic number, because the mean of its divisors is an integer number (52808637).

Almost surely, 2^206205113 is an apocalyptic number.

It is an amenable number.

206205113 is a deficient number, since it is larger than the sum of its proper divisors (5029435).

206205113 is an equidigital number, since it uses as much as digits as its factorization.

206205113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029434.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 206205113 is about 14359.8437665596. The cubic root of 206205113 is about 590.7900103619.

Adding to 206205113 its reverse (311502602), we get a palindrome (517707715).

The spelling of 206205113 in words is "two hundred six million, two hundred five thousand, one hundred thirteen".