2216565114991 has 2 divisors, whose sum is σ = 2216565114992. Its totient is φ = 2216565114990.

The previous prime is 2216565114977. The next prime is 2216565115019. The reversal of 2216565114991 is 1994115656122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2216565114991 - 2²³ = 2216556726383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2216565114391) 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 as a sum of consecutive naturals, namely, 1108282557495 + 1108282557496.

It is an arithmetic number, because the mean of its divisors is an integer number (1108282557496).

Almost surely, 2^{2216565114991} is an apocalyptic number.

2216565114991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216565114991 is an equidigital number, since it uses as much as digits as its factorization.

2216565114991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 52.

The spelling of 2216565114991 in words is "two trillion, two hundred sixteen billion, five hundred sixty-five million, one hundred fourteen thousand, nine hundred ninety-one".