80221671 has 20 divisors (see below), whose sum is σ = 121487872. Its totient is φ = 52744608.

The previous prime is 80221643. The next prime is 80221679. The reversal of 80221671 is 17612208.

It is not a de Polignac number, because 80221671 - 2¹⁷ = 80090599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80221679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 871 + ... + 12696.

Almost surely, 2^80221671 is an apocalyptic number.

80221671 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

80221671 is a deficient number, since it is larger than the sum of its proper divisors (41266201).

80221671 is a wasteful number, since it uses less digits than its factorization.

80221671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13652 (or 13643 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 80221671 is about 8956.6551234264. The cubic root of 80221671 is about 431.2845507290.

Adding to 80221671 its reverse (17612208), we get a palindrome (97833879).

The spelling of 80221671 in words is "eighty million, two hundred twenty-one thousand, six hundred seventy-one".