205343143 has 2 divisors, whose sum is σ = 205343144. Its totient is φ = 205343142.

The previous prime is 205343137. The next prime is 205343167. The reversal of 205343143 is 341343502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205343143 - 2⁵ = 205343111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205343183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102671571 + 102671572.

It is an arithmetic number, because the mean of its divisors is an integer number (102671572).

Almost surely, 2^205343143 is an apocalyptic number.

205343143 is a deficient number, since it is larger than the sum of its proper divisors (1).

205343143 is an equidigital number, since it uses as much as digits as its factorization.

205343143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 205343143 is about 14329.7991262962. The cubic root of 205343143 is about 589.9656620828.

Adding to 205343143 its reverse (341343502), we get a palindrome (546686645).

The spelling of 205343143 in words is "two hundred five million, three hundred forty-three thousand, one hundred forty-three".