71051171 has 4 divisors (see below), whose sum is σ = 71168832. Its totient is φ = 70933512.

The previous prime is 71051129. The next prime is 71051207. The reversal of 71051171 is 17115017.

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 71051171 - 2²⁶ = 3942307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71051671) 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 3 ways as a sum of consecutive naturals, for example, 57920 + ... + 59133.

It is an arithmetic number, because the mean of its divisors is an integer number (17792208).

Almost surely, 2^71051171 is an apocalyptic number.

71051171 is a deficient number, since it is larger than the sum of its proper divisors (117661).

71051171 is a wasteful number, since it uses less digits than its factorization.

71051171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117660.

The product of its (nonzero) digits is 245, while the sum is 23.

The square root of 71051171 is about 8429.1856664805. The cubic root of 71051171 is about 414.1812298255.

Adding to 71051171 its reverse (17115017), we get a palindrome (88166188).

The spelling of 71051171 in words is "seventy-one million, fifty-one thousand, one hundred seventy-one".