2113503 has 16 divisors (see below), whose sum is σ = 3390720. Its totient is φ = 1143936.

The previous prime is 2113471. The next prime is 2113511. The reversal of 2113503 is 3053112.

It is a happy number.

It is not a de Polignac number, because 2113503 - 2⁵ = 2113471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113513) 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, 2250 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (211920).

2^2113503 is an apocalyptic number.

2113503 is a deficient number, since it is larger than the sum of its proper divisors (1277217).

2113503 is a wasteful number, since it uses less digits than its factorization.

2113503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 2113503 is about 1453.7891869181. The cubic root of 2113503 is about 128.3318011099.

Adding to 2113503 its reverse (3053112), we get a palindrome (5166615).

The spelling of 2113503 in words is "two million, one hundred thirteen thousand, five hundred three".