82801171 has 4 divisors (see below), whose sum is σ = 82820344. Its totient is φ = 82782000.

The previous prime is 82801163. The next prime is 82801193. The reversal of 82801171 is 17110828.

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

It is a cyclic number.

It is not a de Polignac number, because 82801171 - 2³ = 82801163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82801111) 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, 271 + ... + 12871.

It is an arithmetic number, because the mean of its divisors is an integer number (20705086).

Almost surely, 2^82801171 is an apocalyptic number.

82801171 is a deficient number, since it is larger than the sum of its proper divisors (19173).

82801171 is a wasteful number, since it uses less digits than its factorization.

82801171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19172.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 82801171 is about 9099.5148771789. The cubic root of 82801171 is about 435.8584729184.

Adding to 82801171 its reverse (17110828), we get a palindrome (99911999).

The spelling of 82801171 in words is "eighty-two million, eight hundred one thousand, one hundred seventy-one".