242258251 has 2 divisors, whose sum is σ = 242258252. Its totient is φ = 242258250.

The previous prime is 242258243. The next prime is 242258281. The reversal of 242258251 is 152852242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242258251 - 2³ = 242258243 is a prime.

It is not a weakly prime, because it can be changed into another prime (242258281) 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, 121129125 + 121129126.

It is an arithmetic number, because the mean of its divisors is an integer number (121129126).

Almost surely, 2^242258251 is an apocalyptic number.

242258251 is a deficient number, since it is larger than the sum of its proper divisors (1).

242258251 is an equidigital number, since it uses as much as digits as its factorization.

242258251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12800, while the sum is 31.

The square root of 242258251 is about 15564.6474743246. The cubic root of 242258251 is about 623.3895614645.

The spelling of 242258251 in words is "two hundred forty-two million, two hundred fifty-eight thousand, two hundred fifty-one".