It is a happy number.
3100 is nontrivially palindromic in base 9 and base 16.
3100 is an undulating number in base 16.
It is a plaindrome in base 11.
It is a nialpdrome in base 5, base 10 and base 15.
It is a zygodrome in base 2 and base 5.
It is a self number, because there is not a number n which added to its sum of digits gives 3100.
It is a congruent number.
23100 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 3100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3472).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3100 is a wasteful number, since it uses less digits than its factorization.
3100 is an odious number, because the sum of its binary digits is odd.
The square root of 3100 is about 55.6776436283. The cubic root of 3100 is about 14.5809973583.
Adding to 3100 its reverse (13), we get a palindrome (3113).
The spelling of 3100 in words is "three thousand, one hundred", and thus it is an iban number.