82711881 has 16 divisors (see below), whose sum is σ = 140041600. Its totient is φ = 47263824.

The previous prime is 82711879. The next prime is 82711897. The reversal of 82711881 is 18811728.

It is not a de Polignac number, because 82711881 - 2¹ = 82711879 is a prime.

It is a super-2 number, since 2×82711881² = 13682510517116322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82711831) 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 15 ways as a sum of consecutive naturals, for example, 218626 + ... + 219003.

It is an arithmetic number, because the mean of its divisors is an integer number (8752600).

Almost surely, 2^82711881 is an apocalyptic number.

It is an amenable number.

82711881 is a deficient number, since it is larger than the sum of its proper divisors (57329719).

82711881 is a wasteful number, since it uses less digits than its factorization.

82711881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437645 (or 437639 counting only the distinct ones).

The product of its digits is 7168, while the sum is 36.

The square root of 82711881 is about 9094.6072482543. The cubic root of 82711881 is about 435.7017448586.

The spelling of 82711881 in words is "eighty-two million, seven hundred eleven thousand, eight hundred eighty-one".