82168172 has 12 divisors (see below), whose sum is σ = 144315360. Its totient is φ = 40935216.

The previous prime is 82168171. The next prime is 82168181. The reversal of 82168172 is 27186128.

It is not an unprimeable number, because it can be changed into a prime (82168171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35972 + ... + 38187.

It is an arithmetic number, because the mean of its divisors is an integer number (12026280).

Almost surely, 2^82168172 is an apocalyptic number.

It is an amenable number.

82168172 is a deficient number, since it is larger than the sum of its proper divisors (62147188).

82168172 is a wasteful number, since it uses less digits than its factorization.

82168172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74440 (or 74438 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 82168172 is about 9064.6661273320. Note that the first 3 decimals coincide. The cubic root of 82168172 is about 434.7449458280.

The spelling of 82168172 in words is "eighty-two million, one hundred sixty-eight thousand, one hundred seventy-two".