8015881 has 4 divisors (see below), whose sum is σ = 8086932. Its totient is φ = 7944832.

The previous prime is 8015867. The next prime is 8015921. The reversal of 8015881 is 1885108.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 7241481 = 880^2 + 2691^2 .

It is a cyclic number.

It is not a de Polignac number, because 8015881 - 2⁵ = 8015849 is a prime.

It is a super-2 number, since 2×8015881² = 128508696412322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8015981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35356 + ... + 35581.

It is an arithmetic number, because the mean of its divisors is an integer number (2021733).

Almost surely, 2^8015881 is an apocalyptic number.

It is an amenable number.

8015881 is a deficient number, since it is larger than the sum of its proper divisors (71051).

8015881 is a wasteful number, since it uses less digits than its factorization.

8015881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71050.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 8015881 is about 2831.2331235700. The cubic root of 8015881 is about 200.1322541915.

The spelling of 8015881 in words is "eight million, fifteen thousand, eight hundred eighty-one".