82105181 has 8 divisors (see below), whose sum is σ = 83597184. Its totient is φ = 80622640.

The previous prime is 82105169. The next prime is 82105187. The reversal of 82105181 is 18150128.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82105181 is a prime.

It is a super-2 number, since 2×82105181² = 13482521494085522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82105181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82105187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16475 + ... + 20871.

It is an arithmetic number, because the mean of its divisors is an integer number (10449648).

Almost surely, 2^82105181 is an apocalyptic number.

It is an amenable number.

82105181 is a deficient number, since it is larger than the sum of its proper divisors (1492003).

82105181 is a wasteful number, since it uses less digits than its factorization.

82105181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 82105181 is about 9061.1909261421. The cubic root of 82105181 is about 434.6338240514.

The spelling of 82105181 in words is "eighty-two million, one hundred five thousand, one hundred eighty-one".