Adding to 5616 its reverse (6165), we get a triangular number (11781 = T153).
5616 is nontrivially palindromic in base 5.
It is an Ulam number.
It is an alternating number because its digits alternate between odd and even.
It is a nialpdrome in base 6, base 9 and base 12.
It is a zygodrome in base 4 and base 12.
It is a congruent number.
It is an unprimeable number.
5616 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 5616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
5616 is a wasteful number, since it uses less digits than its factorization.
5616 is an odious number, because the sum of its binary digits is odd.
The square root of 5616 is about 74.9399759808. The cubic root of 5616 is about 17.7749764104.
The spelling of 5616 in words is "five thousand, six hundred sixteen".