71242824217 has 4 divisors (see below), whose sum is σ = 71270886160. Its totient is φ = 71214762276.

The previous prime is 71242824199. The next prime is 71242824259.

71242824217 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71242824217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71242824217.

It is not an unprimeable number, because it can be changed into a prime (71242824017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14027163 + ... + 14032240.

It is an arithmetic number, because the mean of its divisors is an integer number (17817721540).

Almost surely, 2^71242824217 is an apocalyptic number.

It is an amenable number.

71242824217 is a deficient number, since it is larger than the sum of its proper divisors (28061943).

71242824217 is a wasteful number, since it uses less digits than its factorization.

71242824217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28061942.

The product of its digits is 100352, while the sum is 40.

The spelling of 71242824217 in words is "seventy-one billion, two hundred forty-two million, eight hundred twenty-four thousand, two hundred seventeen".