243033013 has 2 divisors, whose sum is σ = 243033014. Its totient is φ = 243033012.

The previous prime is 243032921. The next prime is 243033029. The reversal of 243033013 is 310330342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139665124 + 103367889 = 11818^2 + 10167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243033013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243033083) 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, 121516506 + 121516507.

It is an arithmetic number, because the mean of its divisors is an integer number (121516507).

Almost surely, 2^243033013 is an apocalyptic number.

It is an amenable number.

243033013 is a deficient number, since it is larger than the sum of its proper divisors (1).

243033013 is an equidigital number, since it uses as much as digits as its factorization.

243033013 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 243033013 is about 15589.5161246268. The cubic root of 243033013 is about 624.0534048159.

Adding to 243033013 its reverse (310330342), we get a palindrome (553363355).

The spelling of 243033013 in words is "two hundred forty-three million, thirty-three thousand, thirteen".