242231047 has 2 divisors, whose sum is σ = 242231048. Its totient is φ = 242231046.

The previous prime is 242231021. The next prime is 242231131. The reversal of 242231047 is 740132242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242231047 - 2²³ = 233842439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242231347) 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, 121115523 + 121115524.

It is an arithmetic number, because the mean of its divisors is an integer number (121115524).

Almost surely, 2^242231047 is an apocalyptic number.

242231047 is a deficient number, since it is larger than the sum of its proper divisors (1).

242231047 is an equidigital number, since it uses as much as digits as its factorization.

242231047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 242231047 is about 15563.7735462837. The cubic root of 242231047 is about 623.3662264155.

Adding to 242231047 its reverse (740132242), we get a palindrome (982363289).

The spelling of 242231047 in words is "two hundred forty-two million, two hundred thirty-one thousand, forty-seven".