206143 has 8 divisors (see below), whose sum is σ = 240800. Its totient is φ = 176400.

The previous prime is 206123. The next prime is 206153. The reversal of 206143 is 341602.

It is a de Polignac number, because none of the positive numbers 2^k-206143 is a prime.

206143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206123) 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 7 ways as a sum of consecutive naturals, for example, 43 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (30100).

2²⁰⁶¹⁴³ is an apocalyptic number.

206143 is a deficient number, since it is larger than the sum of its proper divisors (34657).

206143 is an frugal number, since it uses more digits than its factorization.

206143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 206143 is about 454.0297347091. The cubic root of 206143 is about 59.0730685249.

Adding to 206143 its reverse (341602), we get a palindrome (547745).

The spelling of 206143 in words is "two hundred six thousand, one hundred forty-three".