242243303891 has 2 divisors, whose sum is σ = 242243303892. Its totient is φ = 242243303890.

The previous prime is 242243303873. The next prime is 242243303959. The reversal of 242243303891 is 198303342242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242243303891 is a prime.

It is not a weakly prime, because it can be changed into another prime (242243303191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121121651945 + 121121651946.

It is an arithmetic number, because the mean of its divisors is an integer number (121121651946).

Almost surely, 2^242243303891 is an apocalyptic number.

242243303891 is a deficient number, since it is larger than the sum of its proper divisors (1).

242243303891 is an equidigital number, since it uses as much as digits as its factorization.

242243303891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 242243303891 in words is "two hundred forty-two billion, two hundred forty-three million, three hundred three thousand, eight hundred ninety-one".