243665353103 has 4 divisors (see below), whose sum is σ = 244941088128. Its totient is φ = 242389618080.

The previous prime is 243665353079. The next prime is 243665353109. The reversal of 243665353103 is 301353566342.

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

It is a cyclic number.

It is not a de Polignac number, because 243665353103 - 2²² = 243661158799 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 (243665353109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637867226 + ... + 637867607.

It is an arithmetic number, because the mean of its divisors is an integer number (61235272032).

Almost surely, 2^243665353103 is an apocalyptic number.

243665353103 is a deficient number, since it is larger than the sum of its proper divisors (1275735025).

243665353103 is a wasteful number, since it uses less digits than its factorization.

243665353103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275735024.

The product of its (nonzero) digits is 583200, while the sum is 41.

The spelling of 243665353103 in words is "two hundred forty-three billion, six hundred sixty-five million, three hundred fifty-three thousand, one hundred three".