55443 has 4 divisors (see below), whose sum is σ = 73928. Its totient is φ = 36960.

The previous prime is 55441. The next prime is 55457. The reversal of 55443 is 34455.

It is a happy number.

55443 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55443 - 2¹ = 55441 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55443.

It is not an unprimeable number, because it can be changed into a prime (55441) 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, 9238 + ... + 9243.

It is an arithmetic number, because the mean of its divisors is an integer number (18482).

2⁵⁵⁴⁴³ is an apocalyptic number.

55443 is a deficient number, since it is larger than the sum of its proper divisors (18485).

55443 is a wasteful number, since it uses less digits than its factorization.

55443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18484.

The product of its digits is 1200, while the sum is 21.

The square root of 55443 is about 235.4633729479. The cubic root of 55443 is about 38.1313552068.

Adding to 55443 its reverse (34455), we get a palindrome (89898).

The spelling of 55443 in words is "fifty-five thousand, four hundred forty-three".