82021359 has 16 divisors (see below), whose sum is σ = 125528832. Its totient is φ = 46665408.

The previous prime is 82021351. The next prime is 82021399. The reversal of 82021359 is 95312028.

It is a happy number.

It is not a de Polignac number, because 82021359 - 2³ = 82021351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82021351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3489 + ... + 13274.

It is an arithmetic number, because the mean of its divisors is an integer number (7845552).

Almost surely, 2^82021359 is an apocalyptic number.

82021359 is a deficient number, since it is larger than the sum of its proper divisors (43507473).

82021359 is a wasteful number, since it uses less digits than its factorization.

82021359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17006.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 82021359 is about 9056.5644148319. The cubic root of 82021359 is about 434.4858663510.

The spelling of 82021359 in words is "eighty-two million, twenty-one thousand, three hundred fifty-nine".