80820171 has 12 divisors (see below), whose sum is σ = 118147848. Its totient is φ = 53230464.

The previous prime is 80820169. The next prime is 80820209. The reversal of 80820171 is 17102808.

It is not a de Polignac number, because 80820171 - 2¹ = 80820169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80820161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53350 + ... + 54843.

It is an arithmetic number, because the mean of its divisors is an integer number (9845654).

Almost surely, 2^80820171 is an apocalyptic number.

80820171 is a deficient number, since it is larger than the sum of its proper divisors (37327677).

80820171 is a wasteful number, since it uses less digits than its factorization.

80820171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108282 (or 108279 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 80820171 is about 8990.0039488312. The cubic root of 80820171 is about 432.3544384134.

Adding to 80820171 its reverse (17102808), we get a palindrome (97922979).

The spelling of 80820171 in words is "eighty million, eight hundred twenty thousand, one hundred seventy-one".