65543 has 2 divisors, whose sum is σ = 65544.
Its totient is φ = 65542.
The previous prime is 65539. The next prime is 65551. The reversal of 65543 is 34556.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 65543 - 22 = 65539 is a prime.
It is a Chen prime.
It is a plaindrome in base 13.
It is a nialpdrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (65563) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32771 + 32772.
It is an arithmetic number, because the mean of its divisors is an integer number (32772).
265543 is an apocalyptic number.
65543 is a deficient number, since it is larger than the sum of its proper divisors (1).
65543 is an equidigital number, since it uses as much as digits as its factorization.
65543 is an evil number, because the sum of its binary digits is even.
The product of its digits is 1800, while the sum is 23.
The square root of 65543 is about 256.0136715099.
The cubic root of 65543 is about 40.3189090025.
The spelling of 65543 in words is "sixty-five thousand, five hundred forty-three".