81450082 has 32 divisors (see below), whose sum is σ = 146893824. Its totient is φ = 33134400.

The previous prime is 81450073. The next prime is 81450119. The reversal of 81450082 is 28005418.

It is a self number, because there is not a number n which added to its sum of digits gives 81450082.

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 15 ways as a sum of consecutive naturals, for example, 21232 + ... + 24772.

It is an arithmetic number, because the mean of its divisors is an integer number (4590432).

Almost surely, 2^81450082 is an apocalyptic number.

81450082 is a deficient number, since it is larger than the sum of its proper divisors (65443742).

81450082 is a wasteful number, since it uses less digits than its factorization.

81450082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 81450082 is about 9024.9699168474. The cubic root of 81450082 is about 433.4747870876.

The spelling of 81450082 in words is "eighty-one million, four hundred fifty thousand, eighty-two".