22132321 has 4 divisors (see below), whose sum is σ = 23297200. Its totient is φ = 20967444.

The previous prime is 22132309. The next prime is 22132339. The reversal of 22132321 is 12323122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22132321 - 2¹⁹ = 21608033 is a prime.

It is the 4705-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22132295 and 22132304.

It is not an unprimeable number, because it can be changed into a prime (22132301) by changing a digit.

It is a nontrivial repunit in base 4704.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582411 + ... + 582448.

It is an arithmetic number, because the mean of its divisors is an integer number (5824300).

Almost surely, 2^22132321 is an apocalyptic number.

It is an amenable number.

22132321 is a deficient number, since it is larger than the sum of its proper divisors (1164879).

22132321 is a wasteful number, since it uses less digits than its factorization.

22132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164878.

The product of its digits is 144, while the sum is 16.

The square root of 22132321 is about 4704.5000797109. The cubic root of 22132321 is about 280.7645812165.

Adding to 22132321 its reverse (12323122), we get a palindrome (34455443).

The spelling of 22132321 in words is "twenty-two million, one hundred thirty-two thousand, three hundred twenty-one".