242405311 has 2 divisors, whose sum is σ = 242405312. Its totient is φ = 242405310.

The previous prime is 242405309. The next prime is 242405321. The reversal of 242405311 is 113504242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242405311 - 2¹ = 242405309 is a prime.

Together with 242405309, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242405321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121202655 + 121202656.

It is an arithmetic number, because the mean of its divisors is an integer number (121202656).

Almost surely, 2^242405311 is an apocalyptic number.

242405311 is a deficient number, since it is larger than the sum of its proper divisors (1).

242405311 is an equidigital number, since it uses as much as digits as its factorization.

242405311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 242405311 is about 15569.3709249924. The cubic root of 242405311 is about 623.5156763640.

Adding to 242405311 its reverse (113504242), we get a palindrome (355909553).

The spelling of 242405311 in words is "two hundred forty-two million, four hundred five thousand, three hundred eleven".