82191172 has 12 divisors (see below), whose sum is σ = 164382400. Its totient is φ = 35224776.

The previous prime is 82191149. The next prime is 82191253. The reversal of 82191172 is 27119128.

82191172 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1467672 + ... + 1467727.

Almost surely, 2^82191172 is an apocalyptic number.

It is an amenable number.

82191172 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.

82191172 is a wasteful number, since it uses less digits than its factorization.

82191172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935410 (or 2935408 counting only the distinct ones).

The product of its digits is 2016, while the sum is 31.

The square root of 82191172 is about 9065.9347008458. The cubic root of 82191172 is about 434.7855057378.

The spelling of 82191172 in words is "eighty-two million, one hundred ninety-one thousand, one hundred seventy-two".