44224051981 has 2 divisors, whose sum is σ = 44224051982. Its totient is φ = 44224051980.

The previous prime is 44224051943. The next prime is 44224052021. The reversal of 44224051981 is 18915042244.

It is an a-pointer prime, because the next prime (44224052021) can be obtained adding 44224051981 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42752178756 + 1471873225 = 206766^2 + 38365^2 .

It is a cyclic number.

It is not a de Polignac number, because 44224051981 - 2¹³ = 44224043789 is a prime.

It is a super-2 number, since 2×44224051981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44224051681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22112025990 + 22112025991.

It is an arithmetic number, because the mean of its divisors is an integer number (22112025991).

Almost surely, 2^44224051981 is an apocalyptic number.

It is an amenable number.

44224051981 is a deficient number, since it is larger than the sum of its proper divisors (1).

44224051981 is an equidigital number, since it uses as much as digits as its factorization.

44224051981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 44224051981 in words is "forty-four billion, two hundred twenty-four million, fifty-one thousand, nine hundred eighty-one".