242040191 has 2 divisors, whose sum is σ = 242040192. Its totient is φ = 242040190.

The previous prime is 242040151. The next prime is 242040209. The reversal of 242040191 is 191040242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242040191 - 2¹⁰ = 242039167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242040151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121020095 + 121020096.

It is an arithmetic number, because the mean of its divisors is an integer number (121020096).

Almost surely, 2^242040191 is an apocalyptic number.

242040191 is a deficient number, since it is larger than the sum of its proper divisors (1).

242040191 is an equidigital number, since it uses as much as digits as its factorization.

242040191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 242040191 is about 15557.6409201395. The cubic root of 242040191 is about 623.2024647971.

The spelling of 242040191 in words is "two hundred forty-two million, forty thousand, one hundred ninety-one".