22044440261 has 2 divisors, whose sum is σ = 22044440262. Its totient is φ = 22044440260.

The previous prime is 22044440237. The next prime is 22044440263. The reversal of 22044440261 is 16204444022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19403097025 + 2641343236 = 139295^2 + 51394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22044440261 is a prime.

Together with 22044440263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22044440263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11022220130 + 11022220131.

It is an arithmetic number, because the mean of its divisors is an integer number (11022220131).

Almost surely, 2^22044440261 is an apocalyptic number.

It is an amenable number.

22044440261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22044440261 is an equidigital number, since it uses as much as digits as its factorization.

22044440261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 22044440261 its reverse (16204444022), we get a palindrome (38248884283).

The spelling of 22044440261 in words is "twenty-two billion, forty-four million, four hundred forty thousand, two hundred sixty-one".