242531117 has 2 divisors, whose sum is σ = 242531118. Its totient is φ = 242531116.

The previous prime is 242531087. The next prime is 242531153. The reversal of 242531117 is 711135242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242456041 + 75076 = 15571^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 242531117 - 2⁶ = 242531053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242531167) 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, 121265558 + 121265559.

It is an arithmetic number, because the mean of its divisors is an integer number (121265559).

Almost surely, 2^242531117 is an apocalyptic number.

It is an amenable number.

242531117 is a deficient number, since it is larger than the sum of its proper divisors (1).

242531117 is an equidigital number, since it uses as much as digits as its factorization.

242531117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 242531117 is about 15573.4105770059. The cubic root of 242531117 is about 623.6235239005.

Adding to 242531117 its reverse (711135242), we get a palindrome (953666359).

The spelling of 242531117 in words is "two hundred forty-two million, five hundred thirty-one thousand, one hundred seventeen".