22144544381 has 2 divisors, whose sum is σ = 22144544382. Its totient is φ = 22144544380.

The previous prime is 22144544339. The next prime is 22144544483. The reversal of 22144544381 is 18344544122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12435595225 + 9708949156 = 111515^2 + 98534^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144544381 - 2³⁴ = 4964675197 is a prime.

It is a super-2 number, since 2×22144544381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22144574381) 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, 11072272190 + 11072272191.

It is an arithmetic number, because the mean of its divisors is an integer number (11072272191).

Almost surely, 2^22144544381 is an apocalyptic number.

It is an amenable number.

22144544381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22144544381 is an equidigital number, since it uses as much as digits as its factorization.

22144544381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 38.

The spelling of 22144544381 in words is "twenty-two billion, one hundred forty-four million, five hundred forty-four thousand, three hundred eighty-one".