206136233 has 4 divisors (see below), whose sum is σ = 211163988. Its totient is φ = 201108480.

The previous prime is 206136223. The next prime is 206136241. The reversal of 206136233 is 332631602.

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 52301824 + 153834409 = 7232^2 + 12403^2 .

It is a cyclic number.

It is not a de Polignac number, because 206136233 - 2²⁰ = 205087657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206136223) 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, 2513816 + ... + 2513897.

It is an arithmetic number, because the mean of its divisors is an integer number (52790997).

Almost surely, 2^206136233 is an apocalyptic number.

It is an amenable number.

206136233 is a deficient number, since it is larger than the sum of its proper divisors (5027755).

206136233 is an equidigital number, since it uses as much as digits as its factorization.

206136233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027754.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 206136233 is about 14357.4452114574. The cubic root of 206136233 is about 590.7242212597.

Adding to 206136233 its reverse (332631602), we get a palindrome (538767835).

The spelling of 206136233 in words is "two hundred six million, one hundred thirty-six thousand, two hundred thirty-three".