22044321 has 48 divisors (see below), whose sum is σ = 36363600. Its totient is φ = 12773376.

The previous prime is 22044311. The next prime is 22044353. The reversal of 22044321 is 12344022.

22044321 is a `hidden beast` number, since 220 + 443 + 2 + 1 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2117025 + 19927296 = 1455^2 + 4464^2 .

It is not a de Polignac number, because 22044321 - 2¹⁰ = 22043297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22044294 and 22044303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22044301) 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 47 ways as a sum of consecutive naturals, for example, 247645 + ... + 247733.

It is an arithmetic number, because the mean of its divisors is an integer number (757575).

Almost surely, 2^22044321 is an apocalyptic number.

It is an amenable number.

22044321 is a deficient number, since it is larger than the sum of its proper divisors (14319279).

22044321 is a wasteful number, since it uses less digits than its factorization.

22044321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22044321 is about 4695.1380171407. The cubic root of 22044321 is about 280.3919722801.

Adding to 22044321 its reverse (12344022), we get a palindrome (34388343).

The spelling of 22044321 in words is "twenty-two million, forty-four thousand, three hundred twenty-one".