243223441 has 2 divisors, whose sum is σ = 243223442. Its totient is φ = 243223440.

The previous prime is 243223381. The next prime is 243223447. The reversal of 243223441 is 144322342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241149841 + 2073600 = 15529^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 243223441 - 2⁹ = 243222929 is a prime.

It is not a weakly prime, because it can be changed into another prime (243223447) 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, 121611720 + 121611721.

It is an arithmetic number, because the mean of its divisors is an integer number (121611721).

Almost surely, 2^243223441 is an apocalyptic number.

It is an amenable number.

243223441 is a deficient number, since it is larger than the sum of its proper divisors (1).

243223441 is an equidigital number, since it uses as much as digits as its factorization.

243223441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 25.

The square root of 243223441 is about 15595.6224947900. The cubic root of 243223441 is about 624.2163541694.

Adding to 243223441 its reverse (144322342), we get a palindrome (387545783).

The spelling of 243223441 in words is "two hundred forty-three million, two hundred twenty-three thousand, four hundred forty-one".