243223447 has 2 divisors, whose sum is σ = 243223448. Its totient is φ = 243223446.

The previous prime is 243223441. The next prime is 243223457. The reversal of 243223447 is 744322342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243223447 - 2¹⁵ = 243190679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243223441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121611723 + 121611724.

It is an arithmetic number, because the mean of its divisors is an integer number (121611724).

Almost surely, 2^243223447 is an apocalyptic number.

243223447 is a deficient number, since it is larger than the sum of its proper divisors (1).

243223447 is an equidigital number, since it uses as much as digits as its factorization.

243223447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 31.

The square root of 243223447 is about 15595.6226871517. The cubic root of 243223447 is about 624.2163593023.

Adding to 243223447 its reverse (744322342), we get a palindrome (987545789).

The spelling of 243223447 in words is "two hundred forty-three million, two hundred twenty-three thousand, four hundred forty-seven".