It is a Jordan-Polya number, since it can be written as 4! ⋅ (3!)4.
31104 is nontrivially palindromic in base 15.
It is a tau number, because it is divible by the number of its divisors (48).
It is a nialpdrome in base 6.
It is a zygodrome in base 2.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31104.
It is an unprimeable number.
231104 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 31104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46410).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31104 is an frugal number, since it uses more digits than its factorization.
31104 is an evil number, because the sum of its binary digits is even.
The square root of 31104 is about 176.3632614804. The cubic root of 31104 is about 31.4488967305.
Multiplying 31104 by its product of nonzero digits (12), we get a cube (373248 = 723).
Adding to 31104 its reverse (40113), we get a palindrome (71217).
Subtracting 31104 from its reverse (40113), we obtain a palindrome (9009).
The spelling of 31104 in words is "thirty-one thousand, one hundred four".