22008321 has 8 divisors (see below), whose sum is σ = 32604960. Its totient is φ = 14672196.

The previous prime is 22008307. The next prime is 22008341. The reversal of 22008321 is 12380022.

It is a happy number.

It is not a de Polignac number, because 22008321 - 2⁷ = 22008193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22008294 and 22008303.

It is not an unprimeable number, because it can be changed into a prime (22008341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407535 + ... + 407588.

It is an arithmetic number, because the mean of its divisors is an integer number (4075620).

Almost surely, 2^22008321 is an apocalyptic number.

It is an amenable number.

22008321 is a deficient number, since it is larger than the sum of its proper divisors (10596639).

22008321 is an equidigital number, since it uses as much as digits as its factorization.

22008321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815132 (or 815126 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22008321 is about 4691.3026975457. The cubic root of 22008321 is about 280.2392555357.

Adding to 22008321 its reverse (12380022), we get a palindrome (34388343).

The spelling of 22008321 in words is "twenty-two million, eight thousand, three hundred twenty-one".