243300133 has 2 divisors, whose sum is σ = 243300134. Its totient is φ = 243300132.

The previous prime is 243300119. The next prime is 243300137. The reversal of 243300133 is 331003342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126292644 + 117007489 = 11238^2 + 10817^2 .

It is a cyclic number.

It is not a de Polignac number, because 243300133 - 2⁹ = 243299621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243300133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243300137) 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, 121650066 + 121650067.

It is an arithmetic number, because the mean of its divisors is an integer number (121650067).

Almost surely, 2^243300133 is an apocalyptic number.

It is an amenable number.

243300133 is a deficient number, since it is larger than the sum of its proper divisors (1).

243300133 is an equidigital number, since it uses as much as digits as its factorization.

243300133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 243300133 is about 15598.0810678750. The cubic root of 243300133 is about 624.2819555354.

Adding to 243300133 its reverse (331003342), we get a palindrome (574303475).

The spelling of 243300133 in words is "two hundred forty-three million, three hundred thousand, one hundred thirty-three".