243142203103 has 4 divisors (see below), whose sum is σ = 246472918288. Its totient is φ = 239811487920.

The previous prime is 243142203089. The next prime is 243142203107. The reversal of 243142203103 is 301302241342.

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 243142203103 - 2¹⁷ = 243142072031 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 (243142203107) 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, 1665357483 + ... + 1665357628.

It is an arithmetic number, because the mean of its divisors is an integer number (61618229572).

Almost surely, 2^243142203103 is an apocalyptic number.

243142203103 is a deficient number, since it is larger than the sum of its proper divisors (3330715185).

243142203103 is an equidigital number, since it uses as much as digits as its factorization.

243142203103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330715184.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 243142203103 its reverse (301302241342), we get a palindrome (544444444445).

The spelling of 243142203103 in words is "two hundred forty-three billion, one hundred forty-two million, two hundred three thousand, one hundred three".