216622 has 8 divisors (see below), whose sum is σ = 371376. Its totient is φ = 92832.

The previous prime is 216617. The next prime is 216641. The reversal of 216622 is 226612.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 216622.

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, 7723 + ... + 7750.

It is an arithmetic number, because the mean of its divisors is an integer number (46422).

2²¹⁶⁶²² is an apocalyptic number.

216622 is a deficient number, since it is larger than the sum of its proper divisors (154754).

216622 is a wasteful number, since it uses less digits than its factorization.

216622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15482.

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

The square root of 216622 is about 465.4266859560. The cubic root of 216622 is about 60.0575373991.

It can be divided in two parts, 216 and 622, that added together give a palindrome (838).

The spelling of 216622 in words is "two hundred sixteen thousand, six hundred twenty-two".