8103441781 has 2 divisors, whose sum is σ = 8103441782. Its totient is φ = 8103441780.

The previous prime is 8103441769. The next prime is 8103441839. The reversal of 8103441781 is 1871443018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7989678225 + 113763556 = 89385^2 + 10666^2 .

It is a cyclic number.

It is not a de Polignac number, because 8103441781 - 2⁷ = 8103441653 is a prime.

It is a super-2 number, since 2×8103441781² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8103441781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8103441721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4051720890 + 4051720891.

It is an arithmetic number, because the mean of its divisors is an integer number (4051720891).

Almost surely, 2^8103441781 is an apocalyptic number.

It is an amenable number.

8103441781 is a deficient number, since it is larger than the sum of its proper divisors (1).

8103441781 is an equidigital number, since it uses as much as digits as its factorization.

8103441781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 8103441781 is about 90019.1189748045. The cubic root of 8103441781 is about 2008.5832595487.

Adding to 8103441781 its reverse (1871443018), we get a palindrome (9974884799).

The spelling of 8103441781 in words is "eight billion, one hundred three million, four hundred forty-one thousand, seven hundred eighty-one".