242716321 has 2 divisors, whose sum is σ = 242716322. Its totient is φ = 242716320.

The previous prime is 242716273. The next prime is 242716363. The reversal of 242716321 is 123617242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146676321 + 96040000 = 12111^2 + 9800^2 .

It is a cyclic number.

It is not a de Polignac number, because 242716321 - 2⁷ = 242716193 is a prime.

It is a super-2 number, since 2×242716321² = 117822424959550082, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242716321.

It is not a weakly prime, because it can be changed into another prime (242711321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121358160 + 121358161.

It is an arithmetic number, because the mean of its divisors is an integer number (121358161).

Almost surely, 2^242716321 is an apocalyptic number.

It is an amenable number.

242716321 is a deficient number, since it is larger than the sum of its proper divisors (1).

242716321 is an equidigital number, since it uses as much as digits as its factorization.

242716321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 242716321 is about 15579.3556028483. The cubic root of 242716321 is about 623.7822226905.

The spelling of 242716321 in words is "two hundred forty-two million, seven hundred sixteen thousand, three hundred twenty-one".