22241321 has 4 divisors (see below), whose sum is σ = 23549652. Its totient is φ = 20932992.

The previous prime is 22241309. The next prime is 22241327. The reversal of 22241321 is 12314222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15713296 + 6528025 = 3964^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 22241321 - 2⁶ = 22241257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1308313 = 22241321 / (2 + 2 + 2 + 4 + 1 + 3 + 2 + 1).

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 22241321.

It is not an unprimeable number, because it can be changed into a prime (22241327) 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, 654140 + ... + 654173.

It is an arithmetic number, because the mean of its divisors is an integer number (5887413).

Almost surely, 2^22241321 is an apocalyptic number.

It is an amenable number.

22241321 is a deficient number, since it is larger than the sum of its proper divisors (1308331).

22241321 is a wasteful number, since it uses less digits than its factorization.

22241321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308330.

The product of its digits is 192, while the sum is 17.

The square root of 22241321 is about 4716.0705041380. The cubic root of 22241321 is about 281.2247413695.

Adding to 22241321 its reverse (12314222), we get a palindrome (34555543).

The spelling of 22241321 in words is "twenty-two million, two hundred forty-one thousand, three hundred twenty-one".