216022 has 4 divisors (see below), whose sum is σ = 324036. Its totient is φ = 108010.

The previous prime is 215983. The next prime is 216023. The reversal of 216022 is 220612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 215993 and 216011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54004 + ... + 54007.

It is an arithmetic number, because the mean of its divisors is an integer number (81009).

216022 is a Friedman number, since it can be written as 60^(2+1)+22, using all its digits and the basic arithmetic operations.

2²¹⁶⁰²² is an apocalyptic number.

216022 is a deficient number, since it is larger than the sum of its proper divisors (108014).

216022 is a wasteful number, since it uses less digits than its factorization.

216022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108013.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 216022 is about 464.7816691738. The cubic root of 216022 is about 60.0020369679.

Adding to 216022 its reverse (220612), we get a palindrome (436634).

The spelling of 216022 in words is "two hundred sixteen thousand, twenty-two".