216022369 has 4 divisors (see below), whose sum is σ = 216052740. Its totient is φ = 215992000.

The previous prime is 216022361. The next prime is 216022379. The reversal of 216022369 is 963220612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 75481344 + 140541025 = 8688^2 + 11855^2 .

It is a cyclic number.

It is not a de Polignac number, because 216022369 - 2³ = 216022361 is a prime.

It is a super-3 number, since 3×216022369³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216022369.

It is not an unprimeable number, because it can be changed into a prime (216022361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1869 + ... + 20869.

It is an arithmetic number, because the mean of its divisors is an integer number (54013185).

Almost surely, 2^216022369 is an apocalyptic number.

It is an amenable number.

216022369 is a deficient number, since it is larger than the sum of its proper divisors (30371).

216022369 is a wasteful number, since it uses less digits than its factorization.

216022369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30370.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 216022369 is about 14697.6994458317. The cubic root of 216022369 is about 600.0207113221.

The spelling of 216022369 in words is "two hundred sixteen million, twenty-two thousand, three hundred sixty-nine".