242543771 has 2 divisors, whose sum is σ = 242543772. Its totient is φ = 242543770.

The previous prime is 242543753. The next prime is 242543773. The reversal of 242543771 is 177345242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242543771 is a prime.

Together with 242543773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242543773) 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, 121271885 + 121271886.

It is an arithmetic number, because the mean of its divisors is an integer number (121271886).

Almost surely, 2^242543771 is an apocalyptic number.

242543771 is a deficient number, since it is larger than the sum of its proper divisors (1).

242543771 is an equidigital number, since it uses as much as digits as its factorization.

242543771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 35.

The square root of 242543771 is about 15573.8168410958. The cubic root of 242543771 is about 623.6343695120.

The spelling of 242543771 in words is "two hundred forty-two million, five hundred forty-three thousand, seven hundred seventy-one".