243203122243 has 4 divisors (see below), whose sum is σ = 243224680720. Its totient is φ = 243181563768.

The previous prime is 243203122223. The next prime is 243203122271. The reversal of 243203122243 is 342221302342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243203122243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243203122223) 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, 10762308 + ... + 10784881.

It is an arithmetic number, because the mean of its divisors is an integer number (60806170180).

Almost surely, 2^243203122243 is an apocalyptic number.

243203122243 is a deficient number, since it is larger than the sum of its proper divisors (21558477).

243203122243 is a wasteful number, since it uses less digits than its factorization.

243203122243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21558476.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 243203122243 its reverse (342221302342), we get a palindrome (585424424585).

The spelling of 243203122243 in words is "two hundred forty-three billion, two hundred three million, one hundred twenty-two thousand, two hundred forty-three".