243020123303 has 4 divisors (see below), whose sum is σ = 243119846760. Its totient is φ = 242920399848.

The previous prime is 243020123251. The next prime is 243020123363. The reversal of 243020123303 is 303321020342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243020123303 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 (243020123363) 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 in 3 ways as a sum of consecutive naturals, for example, 49858073 + ... + 49862946.

It is an arithmetic number, because the mean of its divisors is an integer number (60779961690).

Almost surely, 2^243020123303 is an apocalyptic number.

243020123303 is a deficient number, since it is larger than the sum of its proper divisors (99723457).

243020123303 is an equidigital number, since it uses as much as digits as its factorization.

243020123303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99723456.

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

Adding to 243020123303 its reverse (303321020342), we get a palindrome (546341143645).

The spelling of 243020123303 in words is "two hundred forty-three billion, twenty million, one hundred twenty-three thousand, three hundred three".