242043157 has 2 divisors, whose sum is σ = 242043158. Its totient is φ = 242043156.

The previous prime is 242043143. The next prime is 242043163. The reversal of 242043157 is 751340242.

242043157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225930961 + 16112196 = 15031^2 + 4014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242043157 is a prime.

It is equal to p_13267513 and since 242043157 and 13267513 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242046157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121021578 + 121021579.

It is an arithmetic number, because the mean of its divisors is an integer number (121021579).

Almost surely, 2^242043157 is an apocalyptic number.

It is an amenable number.

242043157 is a deficient number, since it is larger than the sum of its proper divisors (1).

242043157 is an equidigital number, since it uses as much as digits as its factorization.

242043157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 242043157 is about 15557.7362427829. The cubic root of 242043157 is about 623.2050103949.

Adding to 242043157 its reverse (751340242), we get a palindrome (993383399).

The spelling of 242043157 in words is "two hundred forty-two million, forty-three thousand, one hundred fifty-seven".