22131321 has 8 divisors (see below), whose sum is σ = 30526080. Its totient is φ = 14245392.

The previous prime is 22131289. The next prime is 22131397. The reversal of 22131321 is 12313122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22131321 - 2⁵ = 22131289 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22131321.

It is not an unprimeable number, because it can be changed into a prime (22131521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127105 + ... + 127278.

It is an arithmetic number, because the mean of its divisors is an integer number (3815760).

Almost surely, 2^22131321 is an apocalyptic number.

It is an amenable number.

22131321 is a deficient number, since it is larger than the sum of its proper divisors (8394759).

22131321 is a wasteful number, since it uses less digits than its factorization.

22131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254415.

The product of its digits is 72, while the sum is 15.

The square root of 22131321 is about 4704.3937972921. The cubic root of 22131321 is about 280.7603525771.

Adding to 22131321 its reverse (12313122), we get a palindrome (34444443).

The spelling of 22131321 in words is "twenty-two million, one hundred thirty-one thousand, three hundred twenty-one".