243222105239891 has 2 divisors, whose sum is σ = 243222105239892. Its totient is φ = 243222105239890.

The previous prime is 243222105239837. The next prime is 243222105240001. The reversal of 243222105239891 is 198932501222342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243222105239891 - 2¹⁴ = 243222105223507 is a prime.

It is a super-2 number, since 2×243222105239891² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243222105239821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121611052619945 + 121611052619946.

It is an arithmetic number, because the mean of its divisors is an integer number (121611052619946).

Almost surely, 2^{243222105239891} is an apocalyptic number.

243222105239891 is a deficient number, since it is larger than the sum of its proper divisors (1).

243222105239891 is an equidigital number, since it uses as much as digits as its factorization.

243222105239891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 243222105239891 in words is "two hundred forty-three trillion, two hundred twenty-two billion, one hundred five million, two hundred thirty-nine thousand, eight hundred ninety-one".