82159081 has 4 divisors (see below), whose sum is σ = 82179072. Its totient is φ = 82139092.

The previous prime is 82159067. The next prime is 82159159. The reversal of 82159081 is 18095128.

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 82159081 - 2¹⁹ = 81634793 is a prime.

It is a super-2 number, since 2×82159081² = 13500229181529122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82159681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321 + ... + 12886.

It is an arithmetic number, because the mean of its divisors is an integer number (20544768).

Almost surely, 2^82159081 is an apocalyptic number.

It is an amenable number.

82159081 is a deficient number, since it is larger than the sum of its proper divisors (19991).

82159081 is a wasteful number, since it uses less digits than its factorization.

82159081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19990.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 82159081 is about 9064.1646609051. The cubic root of 82159081 is about 434.7289119957.

The spelling of 82159081 in words is "eighty-two million, one hundred fifty-nine thousand, eighty-one".