71251506115 has 4 divisors (see below), whose sum is σ = 85501807344. Its totient is φ = 57001204888.

The previous prime is 71251506113. The next prime is 71251506203. The reversal of 71251506115 is 51160515217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71251506115 - 2¹ = 71251506113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71251506113) 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, 7125150607 + ... + 7125150616.

It is an arithmetic number, because the mean of its divisors is an integer number (21375451836).

Almost surely, 2^71251506115 is an apocalyptic number.

71251506115 is a deficient number, since it is larger than the sum of its proper divisors (14250301229).

71251506115 is a wasteful number, since it uses less digits than its factorization.

71251506115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14250301228.

The product of its (nonzero) digits is 10500, while the sum is 34.

The spelling of 71251506115 in words is "seventy-one billion, two hundred fifty-one million, five hundred six thousand, one hundred fifteen".