5543 has 4 divisors (see below), whose sum is σ = 5808.
Its totient is φ = 5280.
The previous prime is 5531. The next prime is 5557. The reversal of 5543 is 3455.
Adding to 5543 its reverse (3455), we get a palindrome (8998).
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3455 = 5 ⋅691.
It is a cyclic number.
It is not a de Polignac number, because 5543 - 24 = 5527 is a prime.
It is a Duffinian number.
It is a nialpdrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (5503) 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, 98 + ... + 143.
It is an arithmetic number, because the mean of its divisors is an integer number (1452).
5543 is a deficient number, since it is larger than the sum of its proper divisors (265).
5543 is a wasteful number, since it uses less digits than its factorization.
5543 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 264.
The product of its digits is 300, while the sum is 17.
The square root of 5543 is about 74.4513263817.
The cubic root of 5543 is about 17.6976238205.
The spelling of 5543 in words is "five thousand, five hundred forty-three".