71500014515 has 4 divisors (see below), whose sum is σ = 85800017424. Its totient is φ = 57200011608.

The previous prime is 71500014497. The next prime is 71500014517. The reversal of 71500014515 is 51541000517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51541000517 = 43 ⋅1198627919.

It is a cyclic number.

It is not a de Polignac number, because 71500014515 - 2²⁶ = 71432905651 is a prime.

It is a super-2 number, since 2×71500014515² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71500014517) 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, 7150001447 + ... + 7150001456.

It is an arithmetic number, because the mean of its divisors is an integer number (21450004356).

Almost surely, 2^71500014515 is an apocalyptic number.

71500014515 is a deficient number, since it is larger than the sum of its proper divisors (14300002909).

71500014515 is a wasteful number, since it uses less digits than its factorization.

71500014515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14300002908.

The product of its (nonzero) digits is 3500, while the sum is 29.

The spelling of 71500014515 in words is "seventy-one billion, five hundred million, fourteen thousand, five hundred fifteen".