242447143 has 2 divisors, whose sum is σ = 242447144. Its totient is φ = 242447142.

The previous prime is 242447141. The next prime is 242447243. The reversal of 242447143 is 341744242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242447143 - 2¹ = 242447141 is a prime.

Together with 242447141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242447141) 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, 121223571 + 121223572.

It is an arithmetic number, because the mean of its divisors is an integer number (121223572).

Almost surely, 2^242447143 is an apocalyptic number.

242447143 is a deficient number, since it is larger than the sum of its proper divisors (1).

242447143 is an equidigital number, since it uses as much as digits as its factorization.

242447143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 31.

The square root of 242447143 is about 15570.7142739182. The cubic root of 242447143 is about 623.5515411001.

The spelling of 242447143 in words is "two hundred forty-two million, four hundred forty-seven thousand, one hundred forty-three".