22560321 has 16 divisors (see below), whose sum is σ = 34864128. Its totient is φ = 12709200.

The previous prime is 22560287. The next prime is 22560359. The reversal of 22560321 is 12306522.

It is not a de Polignac number, because 22560321 - 2¹⁹ = 22036033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22560371) 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 15 ways as a sum of consecutive naturals, for example, 6075 + ... + 9056.

It is an arithmetic number, because the mean of its divisors is an integer number (2179008).

Almost surely, 2^22560321 is an apocalyptic number.

22560321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22560321 is a deficient number, since it is larger than the sum of its proper divisors (12303807).

22560321 is a wasteful number, since it uses less digits than its factorization.

22560321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15212.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22560321 is about 4749.7706260408. The cubic root of 22560321 is about 282.5628690317.

Adding to 22560321 its reverse (12306522), we get a palindrome (34866843).

The spelling of 22560321 in words is "twenty-two million, five hundred sixty thousand, three hundred twenty-one".