71251520071 has 8 divisors (see below), whose sum is σ = 74726825184. Its totient is φ = 67807666080.

The previous prime is 71251520033. The next prime is 71251520077. The reversal of 71251520071 is 17002515217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71251520071 is a prime.

It is a super-2 number, since 2×71251520071² (a number of 23 digits) 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 (71251520077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7858140 + ... + 7867201.

It is an arithmetic number, because the mean of its divisors is an integer number (9340853148).

Almost surely, 2^71251520071 is an apocalyptic number.

71251520071 is a deficient number, since it is larger than the sum of its proper divisors (3475305113).

71251520071 is a wasteful number, since it uses less digits than its factorization.

71251520071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15725561.

The product of its (nonzero) digits is 4900, while the sum is 31.

The spelling of 71251520071 in words is "seventy-one billion, two hundred fifty-one million, five hundred twenty thousand, seventy-one".