8815681 has 8 divisors (see below), whose sum is σ = 10422720. Its totient is φ = 7295568.

The previous prime is 8815663. The next prime is 8815759. The reversal of 8815681 is 1865188.

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

It is not a de Polignac number, because 8815681 - 2¹³ = 8807489 is a prime.

It is a super-2 number, since 2×8815681² = 155432462987522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8815681.

It is not an unprimeable number, because it can be changed into a prime (8815621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21511 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (1302840).

Almost surely, 2^8815681 is an apocalyptic number.

It is an amenable number.

8815681 is a deficient number, since it is larger than the sum of its proper divisors (1607039).

8815681 is a wasteful number, since it uses less digits than its factorization.

8815681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43463.

The product of its digits is 15360, while the sum is 37.

The square root of 8815681 is about 2969.1212504713. The cubic root of 8815681 is about 206.5785805093.

The spelling of 8815681 in words is "eight million, eight hundred fifteen thousand, six hundred eighty-one".