2003431243 has 6 divisors (see below), whose sum is σ = 2202118772. Its totient is φ = 1821301020.

The previous prime is 2003431237. The next prime is 2003431247. The reversal of 2003431243 is 3421343002.

It is a happy number.

It is not a de Polignac number, because 2003431243 - 2²¹ = 2001334091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2003431247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8278521 + ... + 8278762.

Almost surely, 2^2003431243 is an apocalyptic number.

2003431243 is a deficient number, since it is larger than the sum of its proper divisors (198687529).

2003431243 is a wasteful number, since it uses less digits than its factorization.

2003431243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16557305 (or 16557294 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 2003431243 is about 44759.7055732050. The cubic root of 2003431243 is about 1260.6411541235.

Adding to 2003431243 its reverse (3421343002), we get a palindrome (5424774245).

The spelling of 2003431243 in words is "two billion, three million, four hundred thirty-one thousand, two hundred forty-three".