206122243 has 4 divisors (see below), whose sum is σ = 206151400. Its totient is φ = 206093088.

The previous prime is 206122237. The next prime is 206122253. The reversal of 206122243 is 342221602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 206122243 - 2¹⁷ = 205991171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206122253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3496 + ... + 20602.

It is an arithmetic number, because the mean of its divisors is an integer number (51537850).

Almost surely, 2^206122243 is an apocalyptic number.

206122243 is a deficient number, since it is larger than the sum of its proper divisors (29157).

206122243 is a wasteful number, since it uses less digits than its factorization.

206122243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29156.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 206122243 is about 14356.9579995207. The cubic root of 206122243 is about 590.7108572516.

Adding to 206122243 its reverse (342221602), we get a palindrome (548343845).

The spelling of 206122243 in words is "two hundred six million, one hundred twenty-two thousand, two hundred forty-three".