22328321 has 6 divisors (see below), whose sum is σ = 22478850. Its totient is φ = 22178688.

The previous prime is 22328297. The next prime is 22328329. The reversal of 22328321 is 12382322.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 2436721 = 4460^2 + 1561^2 .

It is not a de Polignac number, because 22328321 - 2¹⁰ = 22327297 is a prime.

It is a super-3 number, since 3×22328321³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22328329) 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, 49505 + ... + 49953.

It is an arithmetic number, because the mean of its divisors is an integer number (3746475).

Almost surely, 2^22328321 is an apocalyptic number.

It is an amenable number.

22328321 is a deficient number, since it is larger than the sum of its proper divisors (150529).

22328321 is an frugal number, since it uses more digits than its factorization.

22328321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 672 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 22328321 is about 4725.2852823930. The cubic root of 22328321 is about 281.5909474387.

The spelling of 22328321 in words is "twenty-two million, three hundred twenty-eight thousand, three hundred twenty-one".