2103 has 4 divisors (see below), whose sum is σ = 2808. Its totient is φ = 1400.

The previous prime is 2099. The next prime is 2111. The reversal of 2103 is 3012.

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 not a de Polignac number, because 2103 - 2² = 2099 is a prime.

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 junction number, because it is equal to n+sod(n) for n = 2091 and 2100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348 + ... + 353.

It is an arithmetic number, because the mean of its divisors is an integer number (702).

2²¹⁰³ is an apocalyptic number.

2103 is a deficient number, since it is larger than the sum of its proper divisors (705).

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 product of its (nonzero) digits is 6, while the sum is 6.

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).

It can be divided in two parts, 210 and 3, that multiplied together give a triangular number (630 = T₃₅).

The spelling of 2103 in words is "two thousand, one hundred three", and thus it is an iban number.