242226856657 has 2 divisors, whose sum is σ = 242226856658. Its totient is φ = 242226856656.

The previous prime is 242226856601. The next prime is 242226856681. The reversal of 242226856657 is 756658622242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222171765201 + 20055091456 = 471351^2 + 141616^2 .

It is a cyclic number.

It is not a de Polignac number, because 242226856657 - 2¹⁵ = 242226823889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242226856598 and 242226856607.

It is not a weakly prime, because it can be changed into another prime (242226856957) 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, 121113428328 + 121113428329.

It is an arithmetic number, because the mean of its divisors is an integer number (121113428329).

Almost surely, 2^242226856657 is an apocalyptic number.

It is an amenable number.

242226856657 is a deficient number, since it is larger than the sum of its proper divisors (1).

242226856657 is an equidigital number, since it uses as much as digits as its factorization.

242226856657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19353600, while the sum is 55.

The spelling of 242226856657 in words is "two hundred forty-two billion, two hundred twenty-six million, eight hundred fifty-six thousand, six hundred fifty-seven".