80021171 has 2 divisors, whose sum is σ = 80021172. Its totient is φ = 80021170.

The previous prime is 80021167. The next prime is 80021239. The reversal of 80021171 is 17112008.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80021171 - 2² = 80021167 is a prime.

It is a super-2 number, since 2×80021171² = 12806775616422482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80021111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40010585 + 40010586.

It is an arithmetic number, because the mean of its divisors is an integer number (40010586).

Almost surely, 2^80021171 is an apocalyptic number.

80021171 is a deficient number, since it is larger than the sum of its proper divisors (1).

80021171 is an equidigital number, since it uses as much as digits as its factorization.

80021171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 80021171 is about 8945.4553265890. The cubic root of 80021171 is about 430.9249442680.

Adding to 80021171 its reverse (17112008), we get a palindrome (97133179).

The spelling of 80021171 in words is "eighty million, twenty-one thousand, one hundred seventy-one".