71011161 has 56 divisors (see below), whose sum is σ = 117519360. Its totient is φ = 42620256.

The previous prime is 71011153. The next prime is 71011201. The reversal of 71011161 is 16111017.

It is not a de Polignac number, because 71011161 - 2³ = 71011153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71011141) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 559080 + ... + 559206.

It is an arithmetic number, because the mean of its divisors is an integer number (2098560).

Almost surely, 2^71011161 is an apocalyptic number.

It is an amenable number.

71011161 is a deficient number, since it is larger than the sum of its proper divisors (46508199).

71011161 is a wasteful number, since it uses less digits than its factorization.

71011161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 18.

The square root of 71011161 is about 8426.8120306555. The cubic root of 71011161 is about 414.1034713017.

Adding to 71011161 its reverse (16111017), we get a palindrome (87122178).

The spelling of 71011161 in words is "seventy-one million, eleven thousand, one hundred sixty-one".