• 52 can be written using four 4's:
52 is nontrivially palindromic in base 3, base 5 and base 12.
52 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
52 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.
It is the 5-th Bell number.
It is a magnanimous number.
It is an alternating number because its digits alternate between odd and even.
52 is an undulating number in base 5.
52 is a nontrivial repdigit in base 12.
It is a plaindrome in base 6, base 9, base 11, base 12, base 14, base 15 and base 16.
It is a nialpdrome in base 4, base 8, base 10, base 12 and base 13.
It is a zygodrome in base 12.
It is a congruent number.
52 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
52 is the 4-th decagonal number.
It is an amenable number.
52 is a wasteful number, since it uses less digits than its factorization.
52 is an odious number, because the sum of its binary digits is odd.
The square root of 52 is about 7.2111025509. The cubic root of 52 is about 3.7325111568.
Adding to 52 its reverse (25), we get a palindrome (77).
Subtracting from 52 its reverse (25), we obtain a cube (27 = 33).