808316081 has 4 divisors (see below), whose sum is σ = 810866292. Its totient is φ = 805765872.

The previous prime is 808316077. The next prime is 808316099. The reversal of 808316081 is 180613808.

It is a happy number.

808316081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 207821056 + 600495025 = 14416^2 + 24505^2 .

It is a cyclic number.

It is not a de Polignac number, because 808316081 - 2² = 808316077 is a prime.

It is a super-2 number, since 2×808316081² = 1306749773606397122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (808316381) 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, 1274630 + ... + 1275263.

It is an arithmetic number, because the mean of its divisors is an integer number (202716573).

Almost surely, 2^808316081 is an apocalyptic number.

It is an amenable number.

808316081 is a deficient number, since it is larger than the sum of its proper divisors (2550211).

808316081 is a wasteful number, since it uses less digits than its factorization.

808316081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550210.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 808316081 is about 28430.9001088604. The cubic root of 808316081 is about 931.5233372308.

Adding to 808316081 its reverse (180613808), we get a palindrome (988929889).

The spelling of 808316081 in words is "eight hundred eight million, three hundred sixteen thousand, eighty-one".