80557171 has 4 divisors (see below), whose sum is σ = 81070432. Its totient is φ = 80043912.

The previous prime is 80557159. The next prime is 80557199. The reversal of 80557171 is 17175508.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80557171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80557111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256395 + ... + 256708.

It is an arithmetic number, because the mean of its divisors is an integer number (20267608).

Almost surely, 2^80557171 is an apocalyptic number.

80557171 is a deficient number, since it is larger than the sum of its proper divisors (513261).

80557171 is a wasteful number, since it uses less digits than its factorization.

80557171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513260.

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 80557171 is about 8975.3646722571. The cubic root of 80557171 is about 431.8849484285.

The spelling of 80557171 in words is "eighty million, five hundred fifty-seven thousand, one hundred seventy-one".