16622216 has 32 divisors (see below), whose sum is σ = 33743640. Its totient is φ = 7630848.

The previous prime is 16622201. The next prime is 16622219. The reversal of 16622216 is 61222661.

16622216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13912900 + 2709316 = 3730^2 + 1646^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (16622219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28520 + ... + 29096.

Almost surely, 2^16622216 is an apocalyptic number.

It is an amenable number.

16622216 is an abundant number, since it is smaller than the sum of its proper divisors (17121424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16622216 is a wasteful number, since it uses less digits than its factorization.

16622216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 869 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 16622216 is about 4077.0351972972. The cubic root of 16622216 is about 255.2091888477.

Adding to 16622216 its reverse (61222661), we get a palindrome (77844877).

The spelling of 16622216 in words is "sixteen million, six hundred twenty-two thousand, two hundred sixteen".