242442217 has 2 divisors, whose sum is σ = 242442218. Its totient is φ = 242442216.

The previous prime is 242442197. The next prime is 242442229. The reversal of 242442217 is 712244242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241615936 + 826281 = 15544^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 242442217 - 2⁷ = 242442089 is a prime.

It is not a weakly prime, because it can be changed into another prime (242442257) 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, 121221108 + 121221109.

It is an arithmetic number, because the mean of its divisors is an integer number (121221109).

Almost surely, 2^242442217 is an apocalyptic number.

It is an amenable number.

242442217 is a deficient number, since it is larger than the sum of its proper divisors (1).

242442217 is an equidigital number, since it uses as much as digits as its factorization.

242442217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 28.

The square root of 242442217 is about 15570.5560915466. The cubic root of 242442217 is about 623.5473180000.

Adding to 242442217 its reverse (712244242), we get a palindrome (954686459).

The spelling of 242442217 in words is "two hundred forty-two million, four hundred forty-two thousand, two hundred seventeen".