203545423343 has 4 divisors (see below), whose sum is σ = 203546605920. Its totient is φ = 203544240768.

The previous prime is 203545423243. The next prime is 203545423447. The reversal of 203545423343 is 343324545302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 203545423343 - 2²⁴ = 203528646127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203545423297 and 203545423306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203545423243) 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, 277655 + ... + 695832.

It is an arithmetic number, because the mean of its divisors is an integer number (50886651480).

Almost surely, 2^203545423343 is an apocalyptic number.

203545423343 is a deficient number, since it is larger than the sum of its proper divisors (1182577).

203545423343 is an equidigital number, since it uses as much as digits as its factorization.

203545423343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182576.

The product of its (nonzero) digits is 518400, while the sum is 38.

Adding to 203545423343 its reverse (343324545302), we get a palindrome (546869968645).

The spelling of 203545423343 in words is "two hundred three billion, five hundred forty-five million, four hundred twenty-three thousand, three hundred forty-three".