242228251 has 2 divisors, whose sum is σ = 242228252. Its totient is φ = 242228250.

The previous prime is 242228237. The next prime is 242228263. The reversal of 242228251 is 152822242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242228251 - 2¹⁵ = 242195483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242228281) 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, 121114125 + 121114126.

It is an arithmetic number, because the mean of its divisors is an integer number (121114126).

Almost surely, 2^242228251 is an apocalyptic number.

242228251 is a deficient number, since it is larger than the sum of its proper divisors (1).

242228251 is an equidigital number, since it uses as much as digits as its factorization.

242228251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 28.

The square root of 242228251 is about 15563.6837220499. The cubic root of 242228251 is about 623.3638279634.

The spelling of 242228251 in words is "two hundred forty-two million, two hundred twenty-eight thousand, two hundred fifty-one".