2216221571 has 2 divisors, whose sum is σ = 2216221572. Its totient is φ = 2216221570.

The previous prime is 2216221559. The next prime is 2216221573. The reversal of 2216221571 is 1751226122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2216221571 is a prime.

Together with 2216221573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2216221573) 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, 1108110785 + 1108110786.

It is an arithmetic number, because the mean of its divisors is an integer number (1108110786).

Almost surely, 2^2216221571 is an apocalyptic number.

2216221571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216221571 is an equidigital number, since it uses as much as digits as its factorization.

2216221571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 2216221571 is about 47076.7625373708. The cubic root of 2216221571 is about 1303.7802337922.

Adding to 2216221571 its reverse (1751226122), we get a palindrome (3967447693).

The spelling of 2216221571 in words is "two billion, two hundred sixteen million, two hundred twenty-one thousand, five hundred seventy-one".