243123340303 has 16 divisors (see below), whose sum is σ = 258129498816. Its totient is φ = 228196188160.

The previous prime is 243123340289. The next prime is 243123340331. The reversal of 243123340303 is 303043321342.

It is a happy number.

243123340303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243123340303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243123340373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12243663 + ... + 12263503.

It is an arithmetic number, because the mean of its divisors is an integer number (16133093676).

Almost surely, 2^243123340303 is an apocalyptic number.

243123340303 is a deficient number, since it is larger than the sum of its proper divisors (15006158513).

243123340303 is a wasteful number, since it uses less digits than its factorization.

243123340303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21794.

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 243123340303 its reverse (303043321342), we get a palindrome (546166661645).

The spelling of 243123340303 in words is "two hundred forty-three billion, one hundred twenty-three million, three hundred forty thousand, three hundred three".