82159331 has 4 divisors (see below), whose sum is σ = 84809664. Its totient is φ = 79509000.

The previous prime is 82159313. The next prime is 82159333. The reversal of 82159331 is 13395128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82159331 - 2²⁶ = 15050467 is a prime.

It is a super-2 number, since 2×82159331² = 13500311340735122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82159333) 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, 1325120 + ... + 1325181.

It is an arithmetic number, because the mean of its divisors is an integer number (21202416).

Almost surely, 2^82159331 is an apocalyptic number.

82159331 is a deficient number, since it is larger than the sum of its proper divisors (2650333).

82159331 is a wasteful number, since it uses less digits than its factorization.

82159331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650332.

The product of its digits is 6480, while the sum is 32.

The square root of 82159331 is about 9064.1784514649. The cubic root of 82159331 is about 434.7293529375.

The spelling of 82159331 in words is "eighty-two million, one hundred fifty-nine thousand, three hundred thirty-one".