243505103 has 8 divisors (see below), whose sum is σ = 250713360. Its totient is φ = 236329920.

The previous prime is 243505099. The next prime is 243505147. The reversal of 243505103 is 301505342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243505103 - 2² = 243505099 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 (243505193) 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 7 ways as a sum of consecutive naturals, for example, 7088 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (31339170).

Almost surely, 2^243505103 is an apocalyptic number.

243505103 is a deficient number, since it is larger than the sum of its proper divisors (7208257).

243505103 is a wasteful number, since it uses less digits than its factorization.

243505103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16537.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 243505103 is about 15604.6500441375. The cubic root of 243505103 is about 624.4572166478.

The spelling of 243505103 in words is "two hundred forty-three million, five hundred five thousand, one hundred three".