22321853566781 has 2 divisors, whose sum is σ = 22321853566782. Its totient is φ = 22321853566780.

The previous prime is 22321853566751. The next prime is 22321853566799. The reversal of 22321853566781 is 18766535812322.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21969290753881 + 352562812900 = 4687141^2 + 593770^2 .

It is a cyclic number.

It is not a de Polignac number, because 22321853566781 - 2¹⁸ = 22321853304637 is a prime.

It is a super-3 number, since 3×22321853566781³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 22321853566781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22321853566751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11160926783390 + 11160926783391.

It is an arithmetic number, because the mean of its divisors is an integer number (11160926783391).

Almost surely, 2^{22321853566781} is an apocalyptic number.

It is an amenable number.

22321853566781 is a deficient number, since it is larger than the sum of its proper divisors (1).

22321853566781 is an equidigital number, since it uses as much as digits as its factorization.

22321853566781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 59.

The spelling of 22321853566781 in words is "twenty-two trillion, three hundred twenty-one billion, eight hundred fifty-three million, five hundred sixty-six thousand, seven hundred eighty-one".