13443543 has 16 divisors (see below), whose sum is σ = 20456160. Its totient is φ = 8719488.

The previous prime is 13443541. The next prime is 13443557. The reversal of 13443543 is 34534431.

It is not a de Polignac number, because 13443543 - 2¹ = 13443541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13443541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5730 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (1278510).

Almost surely, 2^13443543 is an apocalyptic number.

13443543 is a deficient number, since it is larger than the sum of its proper divisors (7012617).

13443543 is a wasteful number, since it uses less digits than its factorization.

13443543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13503 (or 13497 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 13443543 is about 3666.5437403637. The cubic root of 13443543 is about 237.7777684530. Note that the first 4 decimals are identical.

Adding to 13443543 its reverse (34534431), we get a palindrome (47977974).

It can be divided in two parts, 13 and 443543, that added together give a square (443556 = 666²).

The spelling of 13443543 in words is "thirteen million, four hundred forty-three thousand, five hundred forty-three".