243105605503 has 2 divisors, whose sum is σ = 243105605504. Its totient is φ = 243105605502.

The previous prime is 243105605467. The next prime is 243105605531. The reversal of 243105605503 is 305506501342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243105605503 - 2²⁹ = 242568734591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243105605203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121552802751 + 121552802752.

It is an arithmetic number, because the mean of its divisors is an integer number (121552802752).

Almost surely, 2^243105605503 is an apocalyptic number.

243105605503 is a deficient number, since it is larger than the sum of its proper divisors (1).

243105605503 is an equidigital number, since it uses as much as digits as its factorization.

243105605503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 243105605503 in words is "two hundred forty-three billion, one hundred five million, six hundred five thousand, five hundred three".