22326581 has 2 divisors, whose sum is σ = 22326582. Its totient is φ = 22326580.

The previous prime is 22326553. The next prime is 22326617. The reversal of 22326581 is 18562322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21771556 + 555025 = 4666^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 22326581 - 2⁶ = 22326517 is a prime.

It is a super-3 number, since 3×22326581³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22325581) 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, 11163290 + 11163291.

It is an arithmetic number, because the mean of its divisors is an integer number (11163291).

Almost surely, 2^22326581 is an apocalyptic number.

It is an amenable number.

22326581 is a deficient number, since it is larger than the sum of its proper divisors (1).

22326581 is an equidigital number, since it uses as much as digits as its factorization.

22326581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 22326581 is about 4725.1011629382. The cubic root of 22326581 is about 281.5836326481.

The spelling of 22326581 in words is "twenty-two million, three hundred twenty-six thousand, five hundred eighty-one".