2103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a D-number.
It is an alternating number because its digits alternate between even and odd.
It is a nialpdrome in base 14 and base 15.
It is a congruent number.
22103 is an apocalyptic number.
2103 is an equidigital number, since it uses as much as digits as its factorization.
2103 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 704.
The square root of 2103 is about 45.8584779512. The cubic root of 2103 is about 12.8118867444.
Adding to 2103 its reverse (3012), we get a palindrome (5115).
Subtracting 2103 from its reverse (3012), we obtain a palindrome (909).
The spelling of 2103 in words is "two thousand, one hundred three", and thus it is an iban number.