206166143 has 2 divisors, whose sum is σ = 206166144. Its totient is φ = 206166142.

The previous prime is 206166137. The next prime is 206166187. The reversal of 206166143 is 341661602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206166143 - 2¹⁶ = 206100607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206166113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103083071 + 103083072.

It is an arithmetic number, because the mean of its divisors is an integer number (103083072).

Almost surely, 2^206166143 is an apocalyptic number.

206166143 is a deficient number, since it is larger than the sum of its proper divisors (1).

206166143 is an equidigital number, since it uses as much as digits as its factorization.

206166143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 206166143 is about 14358.4867935309. The cubic root of 206166143 is about 590.7527908884.

The spelling of 206166143 in words is "two hundred six million, one hundred sixty-six thousand, one hundred forty-three".