2216267891 has 2 divisors, whose sum is σ = 2216267892. Its totient is φ = 2216267890.

The previous prime is 2216267861. The next prime is 2216267929. The reversal of 2216267891 is 1987626122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2216267891 is a prime.

It is not a weakly prime, because it can be changed into another prime (2216267831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108133945 + 1108133946.

It is an arithmetic number, because the mean of its divisors is an integer number (1108133946).

Almost surely, 2^2216267891 is an apocalyptic number.

2216267891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216267891 is an equidigital number, since it uses as much as digits as its factorization.

2216267891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 2216267891 is about 47077.2544972623. The cubic root of 2216267891 is about 1303.7893169213.

The spelling of 2216267891 in words is "two billion, two hundred sixteen million, two hundred sixty-seven thousand, eight hundred ninety-one".