243243541503 has 24 divisors (see below), whose sum is σ = 351985311600. Its totient is φ = 161870123520.

The previous prime is 243243541487. The next prime is 243243541517. The reversal of 243243541503 is 305145342342.

243243541503 is a `hidden beast` number, since 2 + 43 + 24 + 3 + 541 + 50 + 3 = 666.

It is not a de Polignac number, because 243243541503 - 2⁴ = 243243541487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243541543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35254348 + ... + 35261246.

It is an arithmetic number, because the mean of its divisors is an integer number (14666054650).

Almost surely, 2^243243541503 is an apocalyptic number.

243243541503 is a deficient number, since it is larger than the sum of its proper divisors (108741770097).

243243541503 is a wasteful number, since it uses less digits than its factorization.

243243541503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13399 (or 13396 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 243243541503 its reverse (305145342342), we get a palindrome (548388883845).

The spelling of 243243541503 in words is "two hundred forty-three billion, two hundred forty-three million, five hundred forty-one thousand, five hundred three".