82718181 has 24 divisors (see below), whose sum is σ = 147056000. Its totient is φ = 43631136.

The previous prime is 82718171. The next prime is 82718183. The reversal of 82718181 is 18181728.

It is not a de Polignac number, because 82718181 - 2²³ = 74329573 is a prime.

It is a super-3 number, since 3×82718181³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82718183) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49681 + ... + 51318.

Almost surely, 2^82718181 is an apocalyptic number.

It is an amenable number.

82718181 is a deficient number, since it is larger than the sum of its proper divisors (64337819).

82718181 is a wasteful number, since it uses less digits than its factorization.

82718181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101025 (or 101022 counting only the distinct ones).

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

The square root of 82718181 is about 9094.9536007612. The cubic root of 82718181 is about 435.7128067571.

The spelling of 82718181 in words is "eighty-two million, seven hundred eighteen thousand, one hundred eighty-one".