22309321 has 16 divisors (see below), whose sum is σ = 24300864. Its totient is φ = 20404224.

The previous prime is 22309319. The next prime is 22309327. The reversal of 22309321 is 12390322.

It is a cyclic number.

It is not a de Polignac number, because 22309321 - 2¹ = 22309319 is a prime.

It is a super-3 number, since 3×22309321³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22309292 and 22309301.

It is not an unprimeable number, because it can be changed into a prime (22309327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136786 + ... + 136948.

It is an arithmetic number, because the mean of its divisors is an integer number (1518804).

Almost surely, 2^22309321 is an apocalyptic number.

It is an amenable number.

22309321 is a deficient number, since it is larger than the sum of its proper divisors (1991543).

22309321 is a wasteful number, since it uses less digits than its factorization.

22309321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 22309321 is about 4723.2743938924. The cubic root of 22309321 is about 281.5110526974.

Adding to 22309321 its reverse (12390322), we get a palindrome (34699643).

The spelling of 22309321 in words is "twenty-two million, three hundred nine thousand, three hundred twenty-one".