82172 has 6 divisors (see below), whose sum is σ = 143808. Its totient is φ = 41084.

The previous prime is 82171. The next prime is 82183. The reversal of 82172 is 27128.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268 + ... + 10275.

It is an arithmetic number, because the mean of its divisors is an integer number (23968).

2⁸²¹⁷² is an apocalyptic number.

It is an amenable number.

82172 is a deficient number, since it is larger than the sum of its proper divisors (61636).

82172 is a wasteful number, since it uses less digits than its factorization.

82172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20547 (or 20545 counting only the distinct ones).

The product of its digits is 224, while the sum is 20.

The square root of 82172 is about 286.6565889701. The cubic root of 82172 is about 43.4751696933.

The spelling of 82172 in words is "eighty-two thousand, one hundred seventy-two".