216244 has 12 divisors (see below), whose sum is σ = 432544. Its totient is φ = 92664.

The previous prime is 216233. The next prime is 216259. The reversal of 216244 is 442612.

216244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

216244 is an admirable number.

It is a super-2 number, since 2×216244² = 93522935072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3834 + ... + 3889.

2²¹⁶²⁴⁴ is an apocalyptic number.

It is an amenable number.

216244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216244 is a wasteful number, since it uses less digits than its factorization.

216244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734 (or 7732 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 216244 is about 465.0204296587. The cubic root of 216244 is about 60.0225840908.

Subtracting from 216244 its sum of digits (19), we obtain a square (216225 = 465²).

Adding to 216244 its reverse (442612), we get a palindrome (658856).

The spelling of 216244 in words is "two hundred sixteen thousand, two hundred forty-four".