22321044 has 18 divisors (see below), whose sum is σ = 56422730. Its totient is φ = 7440336.

The previous prime is 22321043. The next prime is 22321069. The reversal of 22321044 is 44012322.

It can be written as a sum of positive squares in only one way, i.e., 21511044 + 810000 = 4638^2 + 900^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×22321044³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22321043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 309979 + ... + 310050.

Almost surely, 2^22321044 is an apocalyptic number.

It is an amenable number.

22321044 is an abundant number, since it is smaller than the sum of its proper divisors (34101686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22321044 is a wasteful number, since it uses less digits than its factorization.

22321044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620039 (or 620034 counting only the distinct ones).

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

The square root of 22321044 is about 4724.5152132256. The cubic root of 22321044 is about 281.5603531100.

Adding to 22321044 its reverse (44012322), we get a palindrome (66333366).

The spelling of 22321044 in words is "twenty-two million, three hundred twenty-one thousand, forty-four".