71216065 has 4 divisors (see below), whose sum is σ = 85459284. Its totient is φ = 56972848.

The previous prime is 71216063. The next prime is 71216071. The reversal of 71216065 is 56061217.

71216065 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56061217 = 4259 ⋅13163.

It can be written as a sum of positive squares in 2 ways, for example, as 51208336 + 20007729 = 7156^2 + 4473^2 .

It is a cyclic number.

It is not a de Polignac number, because 71216065 - 2¹ = 71216063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71216063) 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, 7121602 + ... + 7121611.

It is an arithmetic number, because the mean of its divisors is an integer number (21364821).

Almost surely, 2^71216065 is an apocalyptic number.

It is an amenable number.

71216065 is a deficient number, since it is larger than the sum of its proper divisors (14243219).

71216065 is a wasteful number, since it uses less digits than its factorization.

71216065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14243218.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 71216065 is about 8438.9611327461. The cubic root of 71216065 is about 414.5013898523.

The spelling of 71216065 in words is "seventy-one million, two hundred sixteen thousand, sixty-five".