242040400447 has 2 divisors, whose sum is σ = 242040400448. Its totient is φ = 242040400446.

The previous prime is 242040400411. The next prime is 242040400453. The reversal of 242040400447 is 744004040242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242040400447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242040100447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121020200223 + 121020200224.

It is an arithmetic number, because the mean of its divisors is an integer number (121020200224).

Almost surely, 2^242040400447 is an apocalyptic number.

242040400447 is a deficient number, since it is larger than the sum of its proper divisors (1).

242040400447 is an equidigital number, since it uses as much as digits as its factorization.

242040400447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 31.

Adding to 242040400447 its reverse (744004040242), we get a palindrome (986044440689).

The spelling of 242040400447 in words is "two hundred forty-two billion, forty million, four hundred thousand, four hundred forty-seven".