22213321 has 4 divisors (see below), whose sum is σ = 23922052. Its totient is φ = 20504592.

The previous prime is 22213313. The next prime is 22213343. The reversal of 22213321 is 12331222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12996025 + 9217296 = 3605^2 + 3036^2 .

It is a cyclic number.

It is not a de Polignac number, because 22213321 - 2³ = 22213313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22213295 and 22213304.

It is not an unprimeable number, because it can be changed into a prime (22213621) 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, 854346 + ... + 854371.

It is an arithmetic number, because the mean of its divisors is an integer number (5980513).

Almost surely, 2^22213321 is an apocalyptic number.

It is an amenable number.

22213321 is a deficient number, since it is larger than the sum of its proper divisors (1708731).

22213321 is a wasteful number, since it uses less digits than its factorization.

22213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708730.

The product of its digits is 144, while the sum is 16.

The square root of 22213321 is about 4713.1009961595. The cubic root of 22213321 is about 281.1066788462.

Adding to 22213321 its reverse (12331222), we get a palindrome (34544543).

The spelling of 22213321 in words is "twenty-two million, two hundred thirteen thousand, three hundred twenty-one".