81200082 has 32 divisors (see below), whose sum is σ = 166839552. Its totient is φ = 26331984.

The previous prime is 81200059. The next prime is 81200113. The reversal of 81200082 is 28000218.

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, 89073 + ... + 89979.

It is an arithmetic number, because the mean of its divisors is an integer number (5213736).

Almost surely, 2^81200082 is an apocalyptic number.

81200082 is an abundant number, since it is smaller than the sum of its proper divisors (85639470).

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

81200082 is a wasteful number, since it uses less digits than its factorization.

81200082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 81200082 is about 9011.1088107957. The cubic root of 81200082 is about 433.0308351688.

The spelling of 81200082 in words is "eighty-one million, two hundred thousand, eighty-two".