81120082 has 16 divisors (see below), whose sum is σ = 129843360. Its totient is φ = 37897632.

The previous prime is 81120079. The next prime is 81120113. The reversal of 81120082 is 28002118.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11848 + ... + 17395.

It is an arithmetic number, because the mean of its divisors is an integer number (8115210).

Almost surely, 2^81120082 is an apocalyptic number.

81120082 is a deficient number, since it is larger than the sum of its proper divisors (48723278).

81120082 is a wasteful number, since it uses less digits than its factorization.

81120082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29337.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 81120082 is about 9006.6687515418. The cubic root of 81120082 is about 432.8885781291. Note that the first 3 decimals are identical.

The spelling of 81120082 in words is "eighty-one million, one hundred twenty thousand, eighty-two".