82521696 has 24 divisors (see below), whose sum is σ = 216619704. Its totient is φ = 27507200.

The previous prime is 82521661. The next prime is 82521697. The reversal of 82521696 is 69612528.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82521697) 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 3 ways as a sum of consecutive naturals, for example, 429705 + ... + 429896.

It is an arithmetic number, because the mean of its divisors is an integer number (9025821).

Almost surely, 2^82521696 is an apocalyptic number.

It is an amenable number.

82521696 is an abundant number, since it is smaller than the sum of its proper divisors (134098008).

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

82521696 is a wasteful number, since it uses less digits than its factorization.

82521696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859614 (or 859606 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 82521696 is about 9084.1453092737. The cubic root of 82521696 is about 435.3675424516.

The spelling of 82521696 in words is "eighty-two million, five hundred twenty-one thousand, six hundred ninety-six".