82121526 has 40 divisors (see below), whose sum is σ = 194843880. Its totient is φ = 25762752.

The previous prime is 82121513. The next prime is 82121531. The reversal of 82121526 is 62512128.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 82121526.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 12156 + ... + 17663.

It is an arithmetic number, because the mean of its divisors is an integer number (4871097).

Almost surely, 2^82121526 is an apocalyptic number.

82121526 is an abundant number, since it is smaller than the sum of its proper divisors (112722354).

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

82121526 is a wasteful number, since it uses less digits than its factorization.

82121526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29850 (or 29841 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 82121526 is about 9062.0928046451. The cubic root of 82121526 is about 434.6626635571.

The spelling of 82121526 in words is "eighty-two million, one hundred twenty-one thousand, five hundred twenty-six".