8155881 has 12 divisors (see below), whose sum is σ = 11930880. Its totient is φ = 5367960.

The previous prime is 8155859. The next prime is 8155897. The reversal of 8155881 is 1885518.

It is not a de Polignac number, because 8155881 - 2⁶ = 8155817 is a prime.

It is a super-2 number, since 2×8155881² = 133036789772322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8155831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5025 + ... + 6446.

It is an arithmetic number, because the mean of its divisors is an integer number (994240).

Almost surely, 2^8155881 is an apocalyptic number.

It is an amenable number.

8155881 is a deficient number, since it is larger than the sum of its proper divisors (3774999).

8155881 is a wasteful number, since it uses less digits than its factorization.

8155881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11556 (or 11553 counting only the distinct ones).

The product of its digits is 12800, while the sum is 36.

The square root of 8155881 is about 2855.8503112033. The cubic root of 8155881 is about 201.2906613827.

The spelling of 8155881 in words is "eight million, one hundred fifty-five thousand, eight hundred eighty-one".