80512071 has 4 divisors (see below), whose sum is σ = 107349432. Its totient is φ = 53674712.

The previous prime is 80512067. The next prime is 80512129. The reversal of 80512071 is 17021508.

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 80512071 - 2² = 80512067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80512171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13418676 + ... + 13418681.

It is an arithmetic number, because the mean of its divisors is an integer number (26837358).

Almost surely, 2^80512071 is an apocalyptic number.

80512071 is a deficient number, since it is larger than the sum of its proper divisors (26837361).

80512071 is a wasteful number, since it uses less digits than its factorization.

80512071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26837360.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 80512071 is about 8972.8518877779. The cubic root of 80512071 is about 431.8043363324.

Adding to 80512071 its reverse (17021508), we get a palindrome (97533579).

The spelling of 80512071 in words is "eighty million, five hundred twelve thousand, seventy-one".