22705321 has 2 divisors, whose sum is σ = 22705322. Its totient is φ = 22705320.

The previous prime is 22705307. The next prime is 22705327. The reversal of 22705321 is 12350722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22429696 + 275625 = 4736^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 22705321 - 2¹¹ = 22703273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22705292 and 22705301.

It is not a weakly prime, because it can be changed into another prime (22705327) 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, 11352660 + 11352661.

It is an arithmetic number, because the mean of its divisors is an integer number (11352661).

Almost surely, 2^22705321 is an apocalyptic number.

It is an amenable number.

22705321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22705321 is an equidigital number, since it uses as much as digits as its factorization.

22705321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 22705321 is about 4765.0100734416. The cubic root of 22705321 is about 283.1669406719.

The spelling of 22705321 in words is "twenty-two million, seven hundred five thousand, three hundred twenty-one".