82532421 has 6 divisors (see below), whose sum is σ = 119213510. Its totient is φ = 55021608.

The previous prime is 82532389. The next prime is 82532431. The reversal of 82532421 is 12423528.

It can be written as a sum of positive squares in only one way, i.e., 78588225 + 3944196 = 8865^2 + 1986^2 .

It is not a de Polignac number, because 82532421 - 2⁵ = 82532389 is a prime.

It is a super-2 number, since 2×82532421² = 13623201032242482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82532431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4585126 + ... + 4585143.

Almost surely, 2^82532421 is an apocalyptic number.

It is an amenable number.

82532421 is a deficient number, since it is larger than the sum of its proper divisors (36681089).

82532421 is a wasteful number, since it uses less digits than its factorization.

82532421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9170275 (or 9170272 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 82532421 is about 9084.7356042980. The cubic root of 82532421 is about 435.3864026013.

Adding to 82532421 its reverse (12423528), we get a palindrome (94955949).

The spelling of 82532421 in words is "eighty-two million, five hundred thirty-two thousand, four hundred twenty-one".