216226 has 8 divisors (see below), whose sum is σ = 329004. Its totient is φ = 106560.

The previous prime is 216217. The next prime is 216233. The reversal of 216226 is 622612.

It is a Cunningham number, because it is equal to 465²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 216225 + 1 = 465^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 595 + ... + 886.

2²¹⁶²²⁶ is an apocalyptic number.

216226 is a deficient number, since it is larger than the sum of its proper divisors (112778).

216226 is a wasteful number, since it uses less digits than its factorization.

216226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556.

The product of its digits is 288, while the sum is 19.

The square root of 216226 is about 465.0010752676. The cubic root of 216226 is about 60.0209186319.

Adding to 216226 its reverse (622612), we get a palindrome (838838).

The spelling of 216226 in words is "two hundred sixteen thousand, two hundred twenty-six".