81008082 has 24 divisors (see below), whose sum is σ = 176083596. Its totient is φ = 26915616.

The previous prime is 81008071. The next prime is 81008129. The reversal of 81008082 is 28080018.

It can be written as a sum of positive squares in 2 ways, for example, as 80622441 + 385641 = 8979^2 + 621^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1393 + ... + 12804.

Almost surely, 2^81008082 is an apocalyptic number.

81008082 is an abundant number, since it is smaller than the sum of its proper divisors (95075514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81008082 is a wasteful number, since it uses less digits than its factorization.

81008082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14522 (or 14519 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 81008082 is about 9000.4489888005. The cubic root of 81008082 is about 432.6892610593.

The spelling of 81008082 in words is "eighty-one million, eight thousand, eighty-two".