82571172 has 12 divisors (see below), whose sum is σ = 192666096. Its totient is φ = 27523720.

The previous prime is 82571147. The next prime is 82571183. The reversal of 82571172 is 27117528.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3440454 + ... + 3440477.

It is an arithmetic number, because the mean of its divisors is an integer number (16055508).

Almost surely, 2^82571172 is an apocalyptic number.

It is an amenable number.

82571172 is an abundant number, since it is smaller than the sum of its proper divisors (110094924).

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

82571172 is a wasteful number, since it uses less digits than its factorization.

82571172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6880938 (or 6880936 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

The square root of 82571172 is about 9086.8681073294. The cubic root of 82571172 is about 435.4545334781.

The spelling of 82571172 in words is "eighty-two million, five hundred seventy-one thousand, one hundred seventy-two".