205223143 has 2 divisors, whose sum is σ = 205223144. Its totient is φ = 205223142.

The previous prime is 205223113. The next prime is 205223147. The reversal of 205223143 is 341322502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205223143 - 2¹⁷ = 205092071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205223147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102611571 + 102611572.

It is an arithmetic number, because the mean of its divisors is an integer number (102611572).

Almost surely, 2^205223143 is an apocalyptic number.

205223143 is a deficient number, since it is larger than the sum of its proper divisors (1).

205223143 is an equidigital number, since it uses as much as digits as its factorization.

205223143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 205223143 is about 14325.6114354676. The cubic root of 205223143 is about 589.8507168036.

Adding to 205223143 its reverse (341322502), we get a palindrome (546545645).

The spelling of 205223143 in words is "two hundred five million, two hundred twenty-three thousand, one hundred forty-three".