82486181 has 4 divisors (see below), whose sum is σ = 83336652. Its totient is φ = 81635712.

The previous prime is 82486177. The next prime is 82486199. The reversal of 82486181 is 18168428.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67732900 + 14753281 = 8230^2 + 3841^2 .

It is a cyclic number.

It is not a de Polignac number, because 82486181 - 2² = 82486177 is a prime.

It is a super-2 number, since 2×82486181² = 13607940111929522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82486111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425090 + ... + 425283.

It is an arithmetic number, because the mean of its divisors is an integer number (20834163).

Almost surely, 2^82486181 is an apocalyptic number.

It is an amenable number.

82486181 is a deficient number, since it is larger than the sum of its proper divisors (850471).

82486181 is an equidigital number, since it uses as much as digits as its factorization.

82486181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850470.

The product of its digits is 24576, while the sum is 38.

The square root of 82486181 is about 9082.1903195209. The cubic root of 82486181 is about 435.3050768711.

The spelling of 82486181 in words is "eighty-two million, four hundred eighty-six thousand, one hundred eighty-one".