203303304343 has 4 divisors (see below), whose sum is σ = 204667756200. Its totient is φ = 201938852488.

The previous prime is 203303304299. The next prime is 203303304361. The reversal of 203303304343 is 343403303302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343403303302 = 2 ⋅171701651651.

It is not a de Polignac number, because 203303304343 - 2²¹ = 203301207191 is a prime.

It is a super-3 number, since 3×203303304343³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203303302343) 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, 682225705 + ... + 682226002.

It is an arithmetic number, because the mean of its divisors is an integer number (51166939050).

Almost surely, 2^203303304343 is an apocalyptic number.

203303304343 is a deficient number, since it is larger than the sum of its proper divisors (1364451857).

203303304343 is a wasteful number, since it uses less digits than its factorization.

203303304343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364451856.

The product of its (nonzero) digits is 23328, while the sum is 28.

Adding to 203303304343 its reverse (343403303302), we get a palindrome (546706607645).

The spelling of 203303304343 in words is "two hundred three billion, three hundred three million, three hundred four thousand, three hundred forty-three".