55543 has 4 divisors (see below), whose sum is σ = 56440. Its totient is φ = 54648.

The previous prime is 55541. The next prime is 55547. The reversal of 55543 is 34555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34555 = 5 ⋅6911.

It is a cyclic number.

It is not a de Polignac number, because 55543 - 2¹ = 55541 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

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 (55541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348 + ... + 481.

It is an arithmetic number, because the mean of its divisors is an integer number (14110).

2⁵⁵⁵⁴³ is an apocalyptic number.

55543 is a deficient number, since it is larger than the sum of its proper divisors (897).

55543 is an equidigital number, since it uses as much as digits as its factorization.

55543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its digits is 1500, while the sum is 22.

The square root of 55543 is about 235.6756245351. The cubic root of 55543 is about 38.1542666972.

The spelling of 55543 in words is "fifty-five thousand, five hundred forty-three".