216322 has 4 divisors (see below), whose sum is σ = 324486. Its totient is φ = 108160.

The previous prime is 216319. The next prime is 216329. The reversal of 216322 is 223612.

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

It can be written as a sum of positive squares in only one way, i.e., 159201 + 57121 = 399^2 + 239^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216296 and 216305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54079 + ... + 54082.

2²¹⁶³²² is an apocalyptic number.

216322 is a deficient number, since it is larger than the sum of its proper divisors (108164).

216322 is a wasteful number, since it uses less digits than its factorization.

216322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108163.

The product of its digits is 144, while the sum is 16.

The square root of 216322 is about 465.1042893803. The cubic root of 216322 is about 60.0298000117.

Adding to 216322 its reverse (223612), we get a palindrome (439934).

It can be divided in two parts, 21632 and 2, that multiplied together give a square (43264 = 208²).

The spelling of 216322 in words is "two hundred sixteen thousand, three hundred twenty-two".