203103 has 6 divisors (see below), whose sum is σ = 293384. Its totient is φ = 135396.

The previous prime is 203057. The next prime is 203117. The reversal of 203103 is 301302.

It is a happy number.

It is not a de Polignac number, because 203103 - 2⁶ = 203039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 22567 = 203103 / (2 + 0 + 3 + 1 + 0 + 3).

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 203103.

It is not an unprimeable number, because it can be changed into a prime (203173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11275 + ... + 11292.

2²⁰³¹⁰³ is an apocalyptic number.

203103 is a deficient number, since it is larger than the sum of its proper divisors (90281).

203103 is a wasteful number, since it uses less digits than its factorization.

203103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22573 (or 22570 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 203103 is about 450.6695019635. The cubic root of 203103 is about 58.7812448861.

Adding to 203103 its reverse (301302), we get a palindrome (504405).

The spelling of 203103 in words is "two hundred three thousand, one hundred three", and thus it is an iban number.