243043133 has 2 divisors, whose sum is σ = 243043134. Its totient is φ = 243043132.

The previous prime is 243043127. The next prime is 243043183. The reversal of 243043133 is 331340342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177076249 + 65966884 = 13307^2 + 8122^2 .

It is a cyclic number.

It is not a de Polignac number, because 243043133 - 2¹⁰ = 243042109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243043099 and 243043108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243043123) 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, 121521566 + 121521567.

It is an arithmetic number, because the mean of its divisors is an integer number (121521567).

Almost surely, 2^243043133 is an apocalyptic number.

It is an amenable number.

243043133 is a deficient number, since it is larger than the sum of its proper divisors (1).

243043133 is an equidigital number, since it uses as much as digits as its factorization.

243043133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 243043133 is about 15589.8406983522. The cubic root of 243043133 is about 624.0620666471.

Adding to 243043133 its reverse (331340342), we get a palindrome (574383475).

The spelling of 243043133 in words is "two hundred forty-three million, forty-three thousand, one hundred thirty-three".