71204440217 has 2 divisors, whose sum is σ = 71204440218. Its totient is φ = 71204440216.

The previous prime is 71204440207. The next prime is 71204440253.

71204440217 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49197014416 + 22007425801 = 221804^2 + 148349^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 71204440217 - 2¹⁰ = 71204439193 is a prime.

It is not a weakly prime, because it can be changed into another prime (71204440207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35602220108 + 35602220109.

It is an arithmetic number, because the mean of its divisors is an integer number (35602220109).

Almost surely, 2^71204440217 is an apocalyptic number.

It is an amenable number.

71204440217 is a deficient number, since it is larger than the sum of its proper divisors (1).

71204440217 is an equidigital number, since it uses as much as digits as its factorization.

71204440217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 32.

The spelling of 71204440217 in words is "seventy-one billion, two hundred four million, four hundred forty thousand, two hundred seventeen".