243503305423 has 16 divisors (see below), whose sum is σ = 279761515776. Its totient is φ = 207615957120.

The previous prime is 243503305391. The next prime is 243503305427. The reversal of 243503305423 is 324503305342.

It is a cyclic number.

It is not a de Polignac number, because 243503305423 - 2⁵ = 243503305391 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 (243503305427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907815 + ... + 1145047.

It is an arithmetic number, because the mean of its divisors is an integer number (17485094736).

Almost surely, 2^243503305423 is an apocalyptic number.

243503305423 is a deficient number, since it is larger than the sum of its proper divisors (36258210353).

243503305423 is a wasteful number, since it uses less digits than its factorization.

243503305423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238014.

The product of its (nonzero) digits is 129600, while the sum is 34.

The spelling of 243503305423 in words is "two hundred forty-three billion, five hundred three million, three hundred five thousand, four hundred twenty-three".