205223243 has 2 divisors, whose sum is σ = 205223244. Its totient is φ = 205223242.

The previous prime is 205223233. The next prime is 205223297. The reversal of 205223243 is 342322502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205223243 - 2¹⁰ = 205222219 is a prime.

It is not a weakly prime, because it can be changed into another prime (205223203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102611621 + 102611622.

It is an arithmetic number, because the mean of its divisors is an integer number (102611622).

Almost surely, 2^205223243 is an apocalyptic number.

205223243 is a deficient number, since it is larger than the sum of its proper divisors (1).

205223243 is an equidigital number, since it uses as much as digits as its factorization.

205223243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 205223243 is about 14325.6149257196. The cubic root of 205223243 is about 589.8508126100.

Adding to 205223243 its reverse (342322502), we get a palindrome (547545745).

The spelling of 205223243 in words is "two hundred five million, two hundred twenty-three thousand, two hundred forty-three".