82271812 has 12 divisors (see below), whose sum is σ = 164543680. Its totient is φ = 35259336.

The previous prime is 82271809. The next prime is 82271821. The reversal of 82271812 is 21817228.

82271812 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1469112 + ... + 1469167.

Almost surely, 2^82271812 is an apocalyptic number.

It is an amenable number.

82271812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

82271812 is a wasteful number, since it uses less digits than its factorization.

82271812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938290 (or 2938288 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 82271812 is about 9070.3810283802. The cubic root of 82271812 is about 434.9276525650.

The spelling of 82271812 in words is "eighty-two million, two hundred seventy-one thousand, eight hundred twelve".