2118543 has 16 divisors (see below), whose sum is σ = 3271680. Its totient is φ = 1194336.

The previous prime is 2118541. The next prime is 2118547. The reversal of 2118543 is 3458112.

It is not a de Polignac number, because 2118543 - 2¹ = 2118541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118541) 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, 1021 + ... + 2297.

It is an arithmetic number, because the mean of its divisors is an integer number (204480).

2^2118543 is an apocalyptic number.

2118543 is a deficient number, since it is larger than the sum of its proper divisors (1153137).

2118543 is a wasteful number, since it uses less digits than its factorization.

2118543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366.

The product of its digits is 960, while the sum is 24.

The square root of 2118543 is about 1455.5215560066. The cubic root of 2118543 is about 128.4337296506.

It can be divided in two parts, 21 and 18543, that multiplied together give a triangular number (389403 = T₈₈₂).

The spelling of 2118543 in words is "two million, one hundred eighteen thousand, five hundred forty-three".