243203550223 has 4 divisors (see below), whose sum is σ = 253777617648. Its totient is φ = 232629482800.

The previous prime is 243203550221. The next prime is 243203550241. The reversal of 243203550223 is 322055302342.

It is a happy number.

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 243203550223 - 2¹ = 243203550221 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 (243203550221) 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 3 ways as a sum of consecutive naturals, for example, 5287033678 + ... + 5287033723.

It is an arithmetic number, because the mean of its divisors is an integer number (63444404412).

Almost surely, 2^243203550223 is an apocalyptic number.

243203550223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

243203550223 is a deficient number, since it is larger than the sum of its proper divisors (10574067425).

243203550223 is a wasteful number, since it uses less digits than its factorization.

243203550223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10574067424.

The product of its (nonzero) digits is 43200, while the sum is 31.

Adding to 243203550223 its reverse (322055302342), we get a palindrome (565258852565).

The spelling of 243203550223 in words is "two hundred forty-three billion, two hundred three million, five hundred fifty thousand, two hundred twenty-three".