16622213 has 4 divisors (see below), whose sum is σ = 17071500. Its totient is φ = 16172928.

The previous prime is 16622201. The next prime is 16622219. The reversal of 16622213 is 31222661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31222661 = 23 ⋅1357507.

It can be written as a sum of positive squares in 2 ways, for example, as 15626209 + 996004 = 3953^2 + 998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16622213 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 224588 + ... + 224661.

It is an arithmetic number, because the mean of its divisors is an integer number (4267875).

Almost surely, 2^16622213 is an apocalyptic number.

It is an amenable number.

16622213 is a deficient number, since it is larger than the sum of its proper divisors (449287).

16622213 is an equidigital number, since it uses as much as digits as its factorization.

16622213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449286.

The product of its digits is 864, while the sum is 23.

The square root of 16622213 is about 4077.0348293827. The cubic root of 16622213 is about 255.2091734942.

Adding to 16622213 its reverse (31222661), we get a palindrome (47844874).

The spelling of 16622213 in words is "sixteen million, six hundred twenty-two thousand, two hundred thirteen".