203243013 has 28 divisors (see below), whose sum is σ = 308488320. Its totient is φ = 133823016.

The previous prime is 203243011. The next prime is 203243017. The reversal of 203243013 is 310342302.

It is not a de Polignac number, because 203243013 - 2¹ = 203243011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203243011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 58828 + ... + 62186.

It is an arithmetic number, because the mean of its divisors is an integer number (11017440).

Almost surely, 2^203243013 is an apocalyptic number.

It is an amenable number.

203243013 is a deficient number, since it is larger than the sum of its proper divisors (105245307).

203243013 is an frugal number, since it uses more digits than its factorization.

203243013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460 (or 3445 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 203243013 is about 14256.3323824888. The cubic root of 203243013 is about 587.9474911461.

Adding to 203243013 its reverse (310342302), we get a palindrome (513585315).

The spelling of 203243013 in words is "two hundred three million, two hundred forty-three thousand, thirteen".