2013543 has 24 divisors (see below), whose sum is σ = 3434496. Its totient is φ = 1112400.

The previous prime is 2013541. The next prime is 2013553. The reversal of 2013543 is 3453102.

It is not a de Polignac number, because 2013543 - 2¹ = 2013541 is a prime.

2013543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1438 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (143104).

2^2013543 is an apocalyptic number.

2013543 is a deficient number, since it is larger than the sum of its proper divisors (1420953).

2013543 is a wasteful number, since it uses less digits than its factorization.

2013543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 2013543 is about 1418.9936574911. The cubic root of 2013543 is about 126.2758506683.

Adding to 2013543 its sum of digits (18), we get a square (2013561 = 1419²).

Adding to 2013543 its reverse (3453102), we get a palindrome (5466645).

It can be divided in two parts, 2013 and 543, that added together give a triangular number (2556 = T₇₁).

The spelling of 2013543 in words is "two million, thirteen thousand, five hundred forty-three".