71500117 has 4 divisors (see below), whose sum is σ = 77000140. Its totient is φ = 66000096.

The previous prime is 71500081. The next prime is 71500139. The reversal of 71500117 is 71100517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71100517 = 457 ⋅155581.

It can be written as a sum of positive squares in 2 ways, for example, as 33628401 + 37871716 = 5799^2 + 6154^2 .

It is a cyclic number.

It is not a de Polignac number, because 71500117 - 2¹¹ = 71498069 is a prime.

It is a super-2 number, since 2×71500117² = 10224533462027378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71500157) 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, 2749992 + ... + 2750017.

It is an arithmetic number, because the mean of its divisors is an integer number (19250035).

Almost surely, 2^71500117 is an apocalyptic number.

It is an amenable number.

71500117 is a deficient number, since it is larger than the sum of its proper divisors (5500023).

71500117 is a wasteful number, since it uses less digits than its factorization.

71500117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5500022.

The product of its (nonzero) digits is 245, while the sum is 22.

The square root of 71500117 is about 8455.7741809961. The cubic root of 71500117 is about 415.0517514211.

It can be divided in two parts, 71500 and 117, that added together give a palindrome (71617).

The spelling of 71500117 in words is "seventy-one million, five hundred thousand, one hundred seventeen".