16622218 has 8 divisors (see below), whose sum is σ = 25092612. Its totient is φ = 8258016.

The previous prime is 16622201. The next prime is 16622219. The reversal of 16622218 is 81222661.

It can be written as a sum of positive squares in 2 ways, for example, as 16621929 + 289 = 4077^2 + 17^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16622219) 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, 26155 + ... + 26782.

Almost surely, 2^16622218 is an apocalyptic number.

16622218 is a deficient number, since it is larger than the sum of its proper divisors (8470394).

16622218 is a wasteful number, since it uses less digits than its factorization.

16622218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53096.

The product of its digits is 2304, while the sum is 28.

The square root of 16622218 is about 4077.0354425734. The cubic root of 16622218 is about 255.2091990834.

Adding to 16622218 its reverse (81222661), we get a palindrome (97844879).

The spelling of 16622218 in words is "sixteen million, six hundred twenty-two thousand, two hundred eighteen".