2210218991 has 2 divisors, whose sum is σ = 2210218992. Its totient is φ = 2210218990.

The previous prime is 2210218987. The next prime is 2210219009. The reversal of 2210218991 is 1998120122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2210218991 - 2² = 2210218987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2210218931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105109495 + 1105109496.

It is an arithmetic number, because the mean of its divisors is an integer number (1105109496).

Almost surely, 2^2210218991 is an apocalyptic number.

2210218991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210218991 is an equidigital number, since it uses as much as digits as its factorization.

2210218991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 2210218991 is about 47012.9662008259. The cubic root of 2210218991 is about 1302.6020842399.

The spelling of 2210218991 in words is "two billion, two hundred ten million, two hundred eighteen thousand, nine hundred ninety-one".