203440203042143 has 4 divisors (see below), whose sum is σ = 204903801625320. Its totient is φ = 201976604458968.

The previous prime is 203440203042127. The next prime is 203440203042149. The reversal of 203440203042143 is 341240302044302.

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 203440203042143 - 2⁴ = 203440203042127 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 (203440203042149) 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, 731799291380 + ... + 731799291657.

It is an arithmetic number, because the mean of its divisors is an integer number (51225950406330).

Almost surely, 2^{203440203042143} is an apocalyptic number.

203440203042143 is a deficient number, since it is larger than the sum of its proper divisors (1463598583177).

203440203042143 is a wasteful number, since it uses less digits than its factorization.

203440203042143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463598583176.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 203440203042143 its reverse (341240302044302), we get a palindrome (544680505086445).

The spelling of 203440203042143 in words is "two hundred three trillion, four hundred forty billion, two hundred three million, forty-two thousand, one hundred forty-three".