71580216230051 has 4 divisors (see below), whose sum is σ = 71580252666504. Its totient is φ = 71580179793600.

The previous prime is 71580216230011. The next prime is 71580216230059. The reversal of 71580216230051 is 15003261208517.

It is a happy number.

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 71580216230051 - 2⁴⁶ = 1211472052387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71580216229990 and 71580216230008.

It is not an unprimeable number, because it can be changed into a prime (71580216230059) 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, 15092705 + ... + 19260066.

It is an arithmetic number, because the mean of its divisors is an integer number (17895063166626).

Almost surely, 2^{71580216230051} is an apocalyptic number.

71580216230051 is a deficient number, since it is larger than the sum of its proper divisors (36436453).

71580216230051 is a wasteful number, since it uses less digits than its factorization.

71580216230051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36436452.

The product of its (nonzero) digits is 100800, while the sum is 41.

Adding to 71580216230051 its reverse (15003261208517), we get a palindrome (86583477438568).

The spelling of 71580216230051 in words is "seventy-one trillion, five hundred eighty billion, two hundred sixteen million, two hundred thirty thousand, fifty-one".