• 156 can be written using four 4's:
156 is nontrivially palindromic in base 5.
156 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.
156 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.
It is a tau number, because it is divible by the number of its divisors (12).
It is a O'Halloran number.
156 is strictly pandigital in base 4.
156 is a nontrivial repdigit in base 5.
It is a plaindrome in base 5, base 8, base 10 and base 16.
It is a nialpdrome in base 5, base 6, base 12, base 13, base 14 and base 15.
It is a zygodrome in base 5.
It is a congruent number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
156 is a wasteful number, since it uses less digits than its factorization.
156 is an evil number, because the sum of its binary digits is even.
The square root of 156 is about 12.4899959968. The cubic root of 156 is about 5.3832126121.
Subtracting from 156 its sum of digits (12), we obtain a square (144 = 122).
The spelling of 156 in words is "one hundred fifty-six", and thus it is an aban number.