86822081 has 12 divisors (see below), whose sum is σ = 89498892. Its totient is φ = 84209664.

The previous prime is 86822063. The next prime is 86822107. The reversal of 86822081 is 18022868.

It can be written as a sum of positive squares in 6 ways, for example, as 34621456 + 52200625 = 5884^2 + 7225^2 .

It is a de Polignac number, because none of the positive numbers 2^k-86822081 is a prime.

It is a super-2 number, since 2×86822081² = 15076147498341122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86822011) 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, 768281 + ... + 768393.

It is an arithmetic number, because the mean of its divisors is an integer number (7458241).

Almost surely, 2^86822081 is an apocalyptic number.

It is an amenable number.

86822081 is a deficient number, since it is larger than the sum of its proper divisors (2676811).

86822081 is an equidigital number, since it uses as much as digits as its factorization.

86822081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 86822081 is about 9317.8367124564. The cubic root of 86822081 is about 442.8024994915.

The spelling of 86822081 in words is "eighty-six million, eight hundred twenty-two thousand, eighty-one".