82112321 has 4 divisors (see below), whose sum is σ = 82909632. Its totient is φ = 81315012.

The previous prime is 82112297. The next prime is 82112341. The reversal of 82112321 is 12321128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82112321 - 2⁶ = 82112257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82112293 and 82112302.

It is not an unprimeable number, because it can be changed into a prime (82112341) 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, 398501 + ... + 398706.

It is an arithmetic number, because the mean of its divisors is an integer number (20727408).

Almost surely, 2^82112321 is an apocalyptic number.

It is an amenable number.

82112321 is a deficient number, since it is larger than the sum of its proper divisors (797311).

82112321 is a wasteful number, since it uses less digits than its factorization.

82112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797310.

The product of its digits is 192, while the sum is 20.

The square root of 82112321 is about 9061.5849055229. The cubic root of 82112321 is about 434.6464225075.

Adding to 82112321 its reverse (12321128), we get a palindrome (94433449).

The spelling of 82112321 in words is "eighty-two million, one hundred twelve thousand, three hundred twenty-one".