243424133 has 2 divisors, whose sum is σ = 243424134. Its totient is φ = 243424132.

The previous prime is 243424091. The next prime is 243424189. The reversal of 243424133 is 331424342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220017889 + 23406244 = 14833^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 243424133 - 2²⁰ = 242375557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243424733) 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, 121712066 + 121712067.

It is an arithmetic number, because the mean of its divisors is an integer number (121712067).

Almost surely, 2^243424133 is an apocalyptic number.

It is an amenable number.

243424133 is a deficient number, since it is larger than the sum of its proper divisors (1).

243424133 is an equidigital number, since it uses as much as digits as its factorization.

243424133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 26.

The square root of 243424133 is about 15602.0554094645. The cubic root of 243424133 is about 624.3879944076.

Adding to 243424133 its reverse (331424342), we get a palindrome (574848475).

The spelling of 243424133 in words is "two hundred forty-three million, four hundred twenty-four thousand, one hundred thirty-three".