82565871 has 8 divisors (see below), whose sum is σ = 113884080. Its totient is φ = 53145792.

The previous prime is 82565867. The next prime is 82565893. The reversal of 82565871 is 17856528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82565871 - 2² = 82565867 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82565831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474430 + ... + 474603.

It is an arithmetic number, because the mean of its divisors is an integer number (14235510).

Almost surely, 2^82565871 is an apocalyptic number.

82565871 is a deficient number, since it is larger than the sum of its proper divisors (31318209).

82565871 is a wasteful number, since it uses less digits than its factorization.

82565871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949065.

The product of its digits is 134400, while the sum is 42.

The square root of 82565871 is about 9086.5764179915. The cubic root of 82565871 is about 435.4452146734.

It can be divided in two parts, 82565 and 871, that added together give a triangular number (83436 = T₄₀₈).

The spelling of 82565871 in words is "eighty-two million, five hundred sixty-five thousand, eight hundred seventy-one".