22355321 has 2 divisors, whose sum is σ = 22355322. Its totient is φ = 22355320.

The previous prime is 22355297. The next prime is 22355339. The reversal of 22355321 is 12355322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20830096 + 1525225 = 4564^2 + 1235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22355321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22355351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11177660 + 11177661.

It is an arithmetic number, because the mean of its divisors is an integer number (11177661).

Almost surely, 2^22355321 is an apocalyptic number.

It is an amenable number.

22355321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22355321 is an equidigital number, since it uses as much as digits as its factorization.

22355321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 23.

The square root of 22355321 is about 4728.1413895949. The cubic root of 22355321 is about 281.7044041420.

Subtracting from 22355321 its reverse (12355322), we obtain a palindrome (9999999).

The spelling of 22355321 in words is "twenty-two million, three hundred fifty-five thousand, three hundred twenty-one".