203040243 has 16 divisors (see below), whose sum is σ = 343772160. Its totient is φ = 116022888.

The previous prime is 203040209. The next prime is 203040259. The reversal of 203040243 is 342040302.

203040243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203040243 - 2⁶ = 203040179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203040293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536955 + ... + 537332.

It is an arithmetic number, because the mean of its divisors is an integer number (21485760).

Almost surely, 2^203040243 is an apocalyptic number.

203040243 is a deficient number, since it is larger than the sum of its proper divisors (140731917).

203040243 is a wasteful number, since it uses less digits than its factorization.

203040243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074303 (or 1074297 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 203040243 is about 14249.2190312312. The cubic root of 203040243 is about 587.7518997046.

Adding to 203040243 its reverse (342040302), we get a palindrome (545080545).

The spelling of 203040243 in words is "two hundred three million, forty thousand, two hundred forty-three".