22451321 has 2 divisors, whose sum is σ = 22451322. Its totient is φ = 22451320.

The previous prime is 22451311. The next prime is 22451327. The reversal of 22451321 is 12315422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21058921 + 1392400 = 4589^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 22451321 - 2⁶ = 22451257 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22451293 and 22451302.

It is not a weakly prime, because it can be changed into another prime (22451327) 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 as a sum of consecutive naturals, namely, 11225660 + 11225661.

It is an arithmetic number, because the mean of its divisors is an integer number (11225661).

Almost surely, 2^22451321 is an apocalyptic number.

It is an amenable number.

22451321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22451321 is an equidigital number, since it uses as much as digits as its factorization.

22451321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 20.

The square root of 22451321 is about 4738.2824947443. The cubic root of 22451321 is about 282.1070674710.

Adding to 22451321 its reverse (12315422), we get a palindrome (34766743).

The spelling of 22451321 in words is "twenty-two million, four hundred fifty-one thousand, three hundred twenty-one".