71500565 has 4 divisors (see below), whose sum is σ = 85800684. Its totient is φ = 57200448.

The previous prime is 71500547. The next prime is 71500567. The reversal of 71500565 is 56500517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56500517 = 37 ⋅1527041.

It can be written as a sum of positive squares in 2 ways, for example, as 22486564 + 49014001 = 4742^2 + 7001^2 .

It is a cyclic number.

It is not a de Polignac number, because 71500565 - 2⁸ = 71500309 is a prime.

It is a super-2 number, since 2×71500565² = 10224661590638450, 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 (71500567) 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, 7150052 + ... + 7150061.

It is an arithmetic number, because the mean of its divisors is an integer number (21450171).

Almost surely, 2^71500565 is an apocalyptic number.

It is an amenable number.

71500565 is a deficient number, since it is larger than the sum of its proper divisors (14300119).

71500565 is a wasteful number, since it uses less digits than its factorization.

71500565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14300118.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 71500565 is about 8455.8006717283. The cubic root of 71500565 is about 415.0526182859.

The spelling of 71500565 in words is "seventy-one million, five hundred thousand, five hundred sixty-five".