71057171 has 4 divisors (see below), whose sum is σ = 71139072. Its totient is φ = 70975272.

The previous prime is 71057167. The next prime is 71057179. The reversal of 71057171 is 17175017.

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 71057171 - 2² = 71057167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71057179) 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, 39635 + ... + 41388.

It is an arithmetic number, because the mean of its divisors is an integer number (17784768).

Almost surely, 2^71057171 is an apocalyptic number.

71057171 is a deficient number, since it is larger than the sum of its proper divisors (81901).

71057171 is an equidigital number, since it uses as much as digits as its factorization.

71057171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81900.

The product of its (nonzero) digits is 1715, while the sum is 29.

The square root of 71057171 is about 8429.5415652335. The cubic root of 71057171 is about 414.1928881716.

The spelling of 71057171 in words is "seventy-one million, fifty-seven thousand, one hundred seventy-one".