242090311 has 2 divisors, whose sum is σ = 242090312. Its totient is φ = 242090310.

The previous prime is 242090309. The next prime is 242090339. The reversal of 242090311 is 113090242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242090311 - 2¹ = 242090309 is a prime.

Together with 242090309, 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 (242090351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121045155 + 121045156.

It is an arithmetic number, because the mean of its divisors is an integer number (121045156).

Almost surely, 2^242090311 is an apocalyptic number.

242090311 is a deficient number, since it is larger than the sum of its proper divisors (1).

242090311 is an equidigital number, since it uses as much as digits as its factorization.

242090311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 242090311 is about 15559.2516208203. The cubic root of 242090311 is about 623.2454779728.

The spelling of 242090311 in words is "two hundred forty-two million, ninety thousand, three hundred eleven".