218290230091 has 2 divisors, whose sum is σ = 218290230092. Its totient is φ = 218290230090.

The previous prime is 218290230089. The next prime is 218290230161. The reversal of 218290230091 is 190032092812.

218290230091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218290230091 - 2¹ = 218290230089 is a prime.

Together with 218290230089, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 218290230091.

It is not a weakly prime, because it can be changed into another prime (218290230791) 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, 109145115045 + 109145115046.

It is an arithmetic number, because the mean of its divisors is an integer number (109145115046).

Almost surely, 2^218290230091 is an apocalyptic number.

218290230091 is a deficient number, since it is larger than the sum of its proper divisors (1).

218290230091 is an equidigital number, since it uses as much as digits as its factorization.

218290230091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 218290230091 in words is "two hundred eighteen billion, two hundred ninety million, two hundred thirty thousand, ninety-one".