82024821 has 6 divisors (see below), whose sum is σ = 118480310. Its totient is φ = 54683208.

The previous prime is 82024793. The next prime is 82024829. The reversal of 82024821 is 12842028.

It can be written as a sum of positive squares in only one way, i.e., 43758225 + 38266596 = 6615^2 + 6186^2 .

It is not a de Polignac number, because 82024821 - 2⁶ = 82024757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82024829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4556926 + ... + 4556943.

Almost surely, 2^82024821 is an apocalyptic number.

It is an amenable number.

82024821 is a deficient number, since it is larger than the sum of its proper divisors (36455489).

82024821 is a wasteful number, since it uses less digits than its factorization.

82024821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9113875 (or 9113872 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 82024821 is about 9056.7555448958. The cubic root of 82024821 is about 434.4919792665.

Adding to 82024821 its reverse (12842028), we get a palindrome (94866849).

The spelling of 82024821 in words is "eighty-two million, twenty-four thousand, eight hundred twenty-one".