243313303 has 2 divisors, whose sum is σ = 243313304. Its totient is φ = 243313302.

The previous prime is 243313271. The next prime is 243313339. The reversal of 243313303 is 303313342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243313303 - 2⁵ = 243313271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243313003) 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, 121656651 + 121656652.

It is an arithmetic number, because the mean of its divisors is an integer number (121656652).

Almost surely, 2^243313303 is an apocalyptic number.

243313303 is a deficient number, since it is larger than the sum of its proper divisors (1).

243313303 is an equidigital number, since it uses as much as digits as its factorization.

243313303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 22.

The square root of 243313303 is about 15598.5032294769. The cubic root of 243313303 is about 624.2932195996.

Adding to 243313303 its reverse (303313342), we get a palindrome (546626645).

The spelling of 243313303 in words is "two hundred forty-three million, three hundred thirteen thousand, three hundred three".