22331321 has 4 divisors (see below), whose sum is σ = 23302272. Its totient is φ = 21360372.

The previous prime is 22331303. The next prime is 22331333. The reversal of 22331321 is 12313322.

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 22331321 - 2¹⁴ = 22314937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22331321.

It is not an unprimeable number, because it can be changed into a prime (22331341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485441 + ... + 485486.

It is an arithmetic number, because the mean of its divisors is an integer number (5825568).

Almost surely, 2^22331321 is an apocalyptic number.

It is an amenable number.

22331321 is a deficient number, since it is larger than the sum of its proper divisors (970951).

22331321 is an equidigital number, since it uses as much as digits as its factorization.

22331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970950.

The product of its digits is 216, while the sum is 17.

The square root of 22331321 is about 4725.6027128822. The cubic root of 22331321 is about 281.6035582542.

Adding to 22331321 its reverse (12313322), we get a palindrome (34644643).

The spelling of 22331321 in words is "twenty-two million, three hundred thirty-one thousand, three hundred twenty-one".