8312881 has 4 divisors (see below), whose sum is σ = 8801892. Its totient is φ = 7823872.

The previous prime is 8312851. The next prime is 8312903. The reversal of 8312881 is 1882138.

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 3182656 + 5130225 = 1784^2 + 2265^2 .

It is a cyclic number.

It is not a de Polignac number, because 8312881 - 2⁵ = 8312849 is a prime.

It is a super-2 number, since 2×8312881² = 138207981040322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8312851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244480 + ... + 244513.

It is an arithmetic number, because the mean of its divisors is an integer number (2200473).

Almost surely, 2^8312881 is an apocalyptic number.

8312881 is the 1824-th centered pentagonal number.

It is an amenable number.

8312881 is a deficient number, since it is larger than the sum of its proper divisors (489011).

8312881 is a wasteful number, since it uses less digits than its factorization.

8312881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489010.

The product of its digits is 3072, while the sum is 31.

The square root of 8312881 is about 2883.2067216903. The cubic root of 8312881 is about 202.5740703478.

The spelling of 8312881 in words is "eight million, three hundred twelve thousand, eight hundred eighty-one".