44513681 has 2 divisors, whose sum is σ = 44513682. Its totient is φ = 44513680.

The previous prime is 44513641. The next prime is 44513731. The reversal of 44513681 is 18631544.

44513681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30195025 + 14318656 = 5495^2 + 3784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44513681 is a prime.

It is a super-2 number, since 2×44513681² = 3962935592339522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44513611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22256840 + 22256841.

It is an arithmetic number, because the mean of its divisors is an integer number (22256841).

Almost surely, 2^44513681 is an apocalyptic number.

It is an amenable number.

44513681 is a deficient number, since it is larger than the sum of its proper divisors (1).

44513681 is an equidigital number, since it uses as much as digits as its factorization.

44513681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 44513681 is about 6671.8573875646. The cubic root of 44513681 is about 354.4033646773.

The spelling of 44513681 in words is "forty-four million, five hundred thirteen thousand, six hundred eighty-one".