204243443 has 2 divisors, whose sum is σ = 204243444. Its totient is φ = 204243442.

The previous prime is 204243439. The next prime is 204243449. The reversal of 204243443 is 344342402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204243443 - 2² = 204243439 is a prime.

It is not a weakly prime, because it can be changed into another prime (204243449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102121721 + 102121722.

It is an arithmetic number, because the mean of its divisors is an integer number (102121722).

Almost surely, 2^204243443 is an apocalyptic number.

204243443 is a deficient number, since it is larger than the sum of its proper divisors (1).

204243443 is an equidigital number, since it uses as much as digits as its factorization.

204243443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 204243443 is about 14291.3765257235. The cubic root of 204243443 is about 588.9106039314.

Adding to 204243443 its reverse (344342402), we get a palindrome (548585845).

The spelling of 204243443 in words is "two hundred four million, two hundred forty-three thousand, four hundred forty-three".