242255869 has 2 divisors, whose sum is σ = 242255870. Its totient is φ = 242255868.

The previous prime is 242255863. The next prime is 242255891. The reversal of 242255869 is 968552242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191490244 + 50765625 = 13838^2 + 7125^2 .

It is a cyclic number.

It is not a de Polignac number, because 242255869 - 2⁵ = 242255837 is a prime.

It is a super-2 number, since 2×242255869² = 117375812129890322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242255863) 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, 121127934 + 121127935.

It is an arithmetic number, because the mean of its divisors is an integer number (121127935).

Almost surely, 2^242255869 is an apocalyptic number.

It is an amenable number.

242255869 is a deficient number, since it is larger than the sum of its proper divisors (1).

242255869 is an equidigital number, since it uses as much as digits as its factorization.

242255869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 242255869 is about 15564.5709545750. The cubic root of 242255869 is about 623.3875183021.

The spelling of 242255869 in words is "two hundred forty-two million, two hundred fifty-five thousand, eight hundred sixty-nine".