82528321 has 4 divisors (see below), whose sum is σ = 82546992. Its totient is φ = 82509652.

The previous prime is 82528291. The next prime is 82528333. The reversal of 82528321 is 12382528.

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 82528321 - 2¹⁹ = 82004033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82558321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446 + ... + 12928.

It is an arithmetic number, because the mean of its divisors is an integer number (20636748).

Almost surely, 2^82528321 is an apocalyptic number.

It is an amenable number.

82528321 is a deficient number, since it is larger than the sum of its proper divisors (18671).

82528321 is a wasteful number, since it uses less digits than its factorization.

82528321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18670.

The product of its digits is 7680, while the sum is 31.

The square root of 82528321 is about 9084.5099482581. The cubic root of 82528321 is about 435.3791928536.

The spelling of 82528321 in words is "eighty-two million, five hundred twenty-eight thousand, three hundred twenty-one".