81122084 has 24 divisors (see below), whose sum is σ = 143972640. Its totient is φ = 39991616.

The previous prime is 81122033. The next prime is 81122159. The reversal of 81122084 is 48022118.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 97679 + ... + 98505.

It is an arithmetic number, because the mean of its divisors is an integer number (5998860).

Almost surely, 2^81122084 is an apocalyptic number.

It is an amenable number.

81122084 is a deficient number, since it is larger than the sum of its proper divisors (62850556).

81122084 is a wasteful number, since it uses less digits than its factorization.

81122084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 81122084 is about 9006.7798907268. The cubic root of 81122084 is about 432.8921392522.

The spelling of 81122084 in words is "eighty-one million, one hundred twenty-two thousand, eighty-four".