242123317 has 2 divisors, whose sum is σ = 242123318. Its totient is φ = 242123316.

The previous prime is 242123281. The next prime is 242123339. The reversal of 242123317 is 713321242.

It is a happy number.

242123317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159112996 + 83010321 = 12614^2 + 9111^2 .

It is a cyclic number.

It is not a de Polignac number, because 242123317 - 2¹⁵ = 242090549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242123291 and 242123300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242123347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121061658 + 121061659.

It is an arithmetic number, because the mean of its divisors is an integer number (121061659).

Almost surely, 2^242123317 is an apocalyptic number.

It is an amenable number.

242123317 is a deficient number, since it is larger than the sum of its proper divisors (1).

242123317 is an equidigital number, since it uses as much as digits as its factorization.

242123317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 242123317 is about 15560.3122397978. The cubic root of 242123317 is about 623.2738006063.

Adding to 242123317 its reverse (713321242), we get a palindrome (955444559).

The spelling of 242123317 in words is "two hundred forty-two million, one hundred twenty-three thousand, three hundred seventeen".