242554502251 has 2 divisors, whose sum is σ = 242554502252. Its totient is φ = 242554502250.

The previous prime is 242554502243. The next prime is 242554502269. The reversal of 242554502251 is 152205455242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242554502251 - 2³ = 242554502243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242554502251.

It is not a weakly prime, because it can be changed into another prime (242554502051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121277251125 + 121277251126.

It is an arithmetic number, because the mean of its divisors is an integer number (121277251126).

Almost surely, 2^242554502251 is an apocalyptic number.

242554502251 is a deficient number, since it is larger than the sum of its proper divisors (1).

242554502251 is an equidigital number, since it uses as much as digits as its factorization.

242554502251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 242554502251 its reverse (152205455242), we get a palindrome (394759957493).

The spelling of 242554502251 in words is "two hundred forty-two billion, five hundred fifty-four million, five hundred two thousand, two hundred fifty-one".