71217227 has 2 divisors, whose sum is σ = 71217228. Its totient is φ = 71217226.

The previous prime is 71217197. The next prime is 71217229. The reversal of 71217227 is 72271217.

It is a strong prime.

It is an emirp because it is prime and its reverse (72271217) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71217227 is a prime.

Together with 71217229, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71217227.

It is not a weakly prime, because it can be changed into another prime (71217229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35608613 + 35608614.

It is an arithmetic number, because the mean of its divisors is an integer number (35608614).

Almost surely, 2^71217227 is an apocalyptic number.

71217227 is a deficient number, since it is larger than the sum of its proper divisors (1).

71217227 is an equidigital number, since it uses as much as digits as its factorization.

71217227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2744, while the sum is 29.

The square root of 71217227 is about 8439.0299798022. The cubic root of 71217227 is about 414.5036442500.

The spelling of 71217227 in words is "seventy-one million, two hundred seventeen thousand, two hundred twenty-seven".