22323281 has 2 divisors, whose sum is σ = 22323282. Its totient is φ = 22323280.

The previous prime is 22323253. The next prime is 22323307. The reversal of 22323281 is 18232322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 3182656 = 4375^2 + 1784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22323281 is a prime.

It is a super-3 number, since 3×22323281³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22323241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11161640 + 11161641.

It is an arithmetic number, because the mean of its divisors is an integer number (11161641).

Almost surely, 2^22323281 is an apocalyptic number.

It is an amenable number.

22323281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22323281 is an equidigital number, since it uses as much as digits as its factorization.

22323281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 22323281 is about 4724.7519511610. The cubic root of 22323281 is about 281.5697587255.

The spelling of 22323281 in words is "twenty-two million, three hundred twenty-three thousand, two hundred eighty-one".