22406321 has 8 divisors (see below), whose sum is σ = 25872000. Its totient is φ = 19006848.

The previous prime is 22406309. The next prime is 22406327. The reversal of 22406321 is 12360422.

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

It is not a de Polignac number, because 22406321 - 2¹⁴ = 22389937 is a prime.

It is a super-3 number, since 3×22406321³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22406293 and 22406302.

It is not an unprimeable number, because it can be changed into a prime (22406327) 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 7 ways as a sum of consecutive naturals, for example, 15821 + ... + 17178.

It is an arithmetic number, because the mean of its divisors is an integer number (3234000).

Almost surely, 2^22406321 is an apocalyptic number.

It is an amenable number.

22406321 is a deficient number, since it is larger than the sum of its proper divisors (3465679).

22406321 is an equidigital number, since it uses as much as digits as its factorization.

22406321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33103.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22406321 is about 4733.5315568822. The cubic root of 22406321 is about 281.9184622504.

Adding to 22406321 its reverse (12360422), we get a palindrome (34766743).

The spelling of 22406321 in words is "twenty-two million, four hundred six thousand, three hundred twenty-one".