206140223 has 2 divisors, whose sum is σ = 206140224. Its totient is φ = 206140222.

The previous prime is 206140219. The next prime is 206140241. The reversal of 206140223 is 322041602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206140223 - 2² = 206140219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206140195 and 206140204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206140273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103070111 + 103070112.

It is an arithmetic number, because the mean of its divisors is an integer number (103070112).

Almost surely, 2^206140223 is an apocalyptic number.

206140223 is a deficient number, since it is larger than the sum of its proper divisors (1).

206140223 is an equidigital number, since it uses as much as digits as its factorization.

206140223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 206140223 is about 14357.5841630826. The cubic root of 206140223 is about 590.7280326136.

Adding to 206140223 its reverse (322041602), we get a palindrome (528181825).

The spelling of 206140223 in words is "two hundred six million, one hundred forty thousand, two hundred twenty-three".