80217071 has 6 divisors (see below), whose sum is σ = 88172616. Its totient is φ = 72924500.

The previous prime is 80217061. The next prime is 80217079. The reversal of 80217071 is 17071208.

80217071 = 1899² + 1900² + ... + 1920².

It is not a de Polignac number, because 80217071 - 2²² = 76022767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80217071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80217079) 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 5 ways as a sum of consecutive naturals, for example, 331355 + ... + 331596.

It is an arithmetic number, because the mean of its divisors is an integer number (14695436).

Almost surely, 2^80217071 is an apocalyptic number.

80217071 is a deficient number, since it is larger than the sum of its proper divisors (7955545).

80217071 is a wasteful number, since it uses less digits than its factorization.

80217071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662973 (or 662962 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 80217071 is about 8956.3983274528. The cubic root of 80217071 is about 431.2763071258.

Adding to 80217071 its reverse (17071208), we get a palindrome (97288279).

The spelling of 80217071 in words is "eighty million, two hundred seventeen thousand, seventy-one".