22321065 has 16 divisors (see below), whose sum is σ = 38461248. Its totient is φ = 10988736.

The previous prime is 22321043. The next prime is 22321069. The reversal of 22321065 is 56012322.

It is not a de Polignac number, because 22321065 - 2¹⁶ = 22255529 is a prime.

It is a super-3 number, since 3×22321065³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22321069) 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 15 ways as a sum of consecutive naturals, for example, 57039 + ... + 57428.

It is an arithmetic number, because the mean of its divisors is an integer number (2403828).

Almost surely, 2^22321065 is an apocalyptic number.

It is an amenable number.

22321065 is a deficient number, since it is larger than the sum of its proper divisors (16140183).

22321065 is a wasteful number, since it uses less digits than its factorization.

22321065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114488.

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

The square root of 22321065 is about 4724.5174356753. The cubic root of 22321065 is about 281.5604414088.

Adding to 22321065 its reverse (56012322), we get a palindrome (78333387).

The spelling of 22321065 in words is "twenty-two million, three hundred twenty-one thousand, sixty-five".