53443 has 4 divisors (see below), whose sum is σ = 57568. Its totient is φ = 49320.

The previous prime is 53441. The next prime is 53453. The reversal of 53443 is 34435.

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

It is a cyclic number.

It is not a de Polignac number, because 53443 - 2¹ = 53441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53443.

It is not an unprimeable number, because it can be changed into a prime (53441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2043 + ... + 2068.

It is an arithmetic number, because the mean of its divisors is an integer number (14392).

2⁵³⁴⁴³ is an apocalyptic number.

53443 is a deficient number, since it is larger than the sum of its proper divisors (4125).

53443 is a wasteful number, since it uses less digits than its factorization.

53443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124.

The product of its digits is 720, while the sum is 19.

The square root of 53443 is about 231.1774210428. The cubic root of 53443 is about 37.6672235627.

Adding to 53443 its reverse (34435), we get a palindrome (87878).

It can be divided in two parts, 53 and 443, that added together give a triangular number (496 = T₃₁).

The spelling of 53443 in words is "fifty-three thousand, four hundred forty-three".