243310230203 has 4 divisors (see below), whose sum is σ = 253888935888. Its totient is φ = 232731524520.

The previous prime is 243310230199. The next prime is 243310230209. The reversal of 243310230203 is 302032013342.

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 243310230203 - 2² = 243310230199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 10578705661 = 243310230203 / (2 + 4 + 3 + 3 + 1 + 0 + 2 + 3 + 0 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243310230209) 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 3 ways as a sum of consecutive naturals, for example, 5289352808 + ... + 5289352853.

It is an arithmetic number, because the mean of its divisors is an integer number (63472233972).

Almost surely, 2^243310230203 is an apocalyptic number.

243310230203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

243310230203 is a deficient number, since it is larger than the sum of its proper divisors (10578705685).

243310230203 is a wasteful number, since it uses less digits than its factorization.

243310230203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10578705684.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 243310230203 its reverse (302032013342), we get a palindrome (545342243545).

The spelling of 243310230203 in words is "two hundred forty-three billion, three hundred ten million, two hundred thirty thousand, two hundred three".