82081181 has 16 divisors (see below), whose sum is σ = 105417984. Its totient is φ = 62118144.

The previous prime is 82081177. The next prime is 82081187. The reversal of 82081181 is 18118028.

It is a cyclic number.

It is not a de Polignac number, because 82081181 - 2² = 82081177 is a prime.

It is a super-2 number, since 2×82081181² = 13474640548709522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82081187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17516 + ... + 21701.

It is an arithmetic number, because the mean of its divisors is an integer number (6588624).

Almost surely, 2^82081181 is an apocalyptic number.

It is an amenable number.

82081181 is a deficient number, since it is larger than the sum of its proper divisors (23336803).

82081181 is a wasteful number, since it uses less digits than its factorization.

82081181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39260.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 82081181 is about 9059.8665001202. The cubic root of 82081181 is about 434.5914709454.

The spelling of 82081181 in words is "eighty-two million, eighty-one thousand, one hundred eighty-one".