82857111 has 8 divisors (see below), whose sum is σ = 110887920. Its totient is φ = 55032192.

The previous prime is 82857077. The next prime is 82857149. The reversal of 82857111 is 11175828.

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

It is a de Polignac number, because none of the positive numbers 2^k-82857111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82857161) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 50530 + ... + 52143.

It is an arithmetic number, because the mean of its divisors is an integer number (13860990).

Almost surely, 2^82857111 is an apocalyptic number.

82857111 is a deficient number, since it is larger than the sum of its proper divisors (28030809).

82857111 is a wasteful number, since it uses less digits than its factorization.

82857111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102945.

The product of its digits is 4480, while the sum is 33.

The square root of 82857111 is about 9102.5881484334. The cubic root of 82857111 is about 435.9566053240.

The spelling of 82857111 in words is "eighty-two million, eight hundred fifty-seven thousand, one hundred eleven".