71311161 has 16 divisors (see below), whose sum is σ = 101217600. Its totient is φ = 44529408.

The previous prime is 71311159. The next prime is 71311169. The reversal of 71311161 is 16111317.

It is not a de Polignac number, because 71311161 - 2¹ = 71311159 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71311169) 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 15 ways as a sum of consecutive naturals, for example, 1956 + ... + 12101.

It is an arithmetic number, because the mean of its divisors is an integer number (6326100).

Almost surely, 2^71311161 is an apocalyptic number.

It is an amenable number.

71311161 is a deficient number, since it is larger than the sum of its proper divisors (29906439).

71311161 is a wasteful number, since it uses less digits than its factorization.

71311161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14168.

The product of its digits is 126, while the sum is 21.

The square root of 71311161 is about 8444.5935959050. The cubic root of 71311161 is about 414.6858046668.

Adding to 71311161 its reverse (16111317), we get a palindrome (87422478).

The spelling of 71311161 in words is "seventy-one million, three hundred eleven thousand, one hundred sixty-one".