82172532 has 36 divisors (see below), whose sum is σ = 207624480. Its totient is φ = 25283232.

The previous prime is 82172521. The next prime is 82172533. The reversal of 82172532 is 23527128.

It is a self number, because there is not a number n which added to its sum of digits gives 82172532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82172533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18232 + ... + 22287.

Almost surely, 2^82172532 is an apocalyptic number.

It is an amenable number.

82172532 is an abundant number, since it is smaller than the sum of its proper divisors (125451948).

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

82172532 is a wasteful number, since it uses less digits than its factorization.

82172532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40552 (or 40537 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 82172532 is about 9064.9066183828. The cubic root of 82172532 is about 434.7526351575.

The spelling of 82172532 in words is "eighty-two million, one hundred seventy-two thousand, five hundred thirty-two".