44421281 has 2 divisors, whose sum is σ = 44421282. Its totient is φ = 44421280.

The previous prime is 44421253. The next prime is 44421287. The reversal of 44421281 is 18212444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25411681 + 19009600 = 5041^2 + 4360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44421281 is a prime.

It is a super-2 number, since 2×44421281² = 3946500411361922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 44421281.

It is not a weakly prime, because it can be changed into another prime (44421287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22210640 + 22210641.

It is an arithmetic number, because the mean of its divisors is an integer number (22210641).

Almost surely, 2^44421281 is an apocalyptic number.

It is an amenable number.

44421281 is a deficient number, since it is larger than the sum of its proper divisors (1).

44421281 is an equidigital number, since it uses as much as digits as its factorization.

44421281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048, while the sum is 26.

The square root of 44421281 is about 6664.9291819193. The cubic root of 44421281 is about 354.1579752854.

The spelling of 44421281 in words is "forty-four million, four hundred twenty-one thousand, two hundred eighty-one".