8101681 has 8 divisors (see below), whose sum is σ = 9661824. Its totient is φ = 6642240.

The previous prime is 8101669. The next prime is 8101699. The reversal of 8101681 is 1861018.

It is a happy number.

8101681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8101681 is a prime.

It is a super-2 number, since 2×8101681² = 131274470051522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8101651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25000 + ... + 25321.

It is an arithmetic number, because the mean of its divisors is an integer number (1207728).

Almost surely, 2^8101681 is an apocalyptic number.

It is an amenable number.

8101681 is a deficient number, since it is larger than the sum of its proper divisors (1560143).

8101681 is a wasteful number, since it uses less digits than its factorization.

8101681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50351.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 8101681 is about 2846.3452004281. The cubic root of 8101681 is about 200.8437768636.

Adding to 8101681 its reverse (1861018), we get a palindrome (9962699).

The spelling of 8101681 in words is "eight million, one hundred one thousand, six hundred eighty-one".