71131056751015 has 4 divisors (see below), whose sum is σ = 85357268101224. Its totient is φ = 56904845400808.

The previous prime is 71131056750997. The next prime is 71131056751063. The reversal of 71131056751015 is 51015765013117.

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 71131056751015 - 2¹⁵ = 71131056718247 is a prime.

It is a super-2 number, since 2×71131056751015² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7113105675097 + ... + 7113105675106.

It is an arithmetic number, because the mean of its divisors is an integer number (21339317025306).

Almost surely, 2^{71131056751015} is an apocalyptic number.

71131056751015 is a deficient number, since it is larger than the sum of its proper divisors (14226211350209).

71131056751015 is a wasteful number, since it uses less digits than its factorization.

71131056751015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14226211350208.

The product of its (nonzero) digits is 110250, while the sum is 43.

The spelling of 71131056751015 in words is "seventy-one trillion, one hundred thirty-one billion, fifty-six million, seven hundred fifty-one thousand, fifteen".