213864 divided by its sum of digits (24) gives a triangular number (8911 = T133).
It is a happy number.
213864 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a nude number because it is divisible by every one of its digits.
It is an unprimeable number.
2213864 is an apocalyptic number.
213864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 213864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326400).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
213864 is a wasteful number, since it uses less digits than its factorization.
213864 is an evil number, because the sum of its binary digits is even.
The square root of 213864 is about 462.4543220687. The cubic root of 213864 is about 59.8015666827.
The spelling of 213864 in words is "two hundred thirteen thousand, eight hundred sixty-four".