242551171 has 2 divisors, whose sum is σ = 242551172. Its totient is φ = 242551170.

The previous prime is 242551163. The next prime is 242551193. The reversal of 242551171 is 171155242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242551171 - 2³ = 242551163 is a prime.

It is not a weakly prime, because it can be changed into another prime (242551271) 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, 121275585 + 121275586.

It is an arithmetic number, because the mean of its divisors is an integer number (121275586).

Almost surely, 2^242551171 is an apocalyptic number.

242551171 is a deficient number, since it is larger than the sum of its proper divisors (1).

242551171 is an equidigital number, since it uses as much as digits as its factorization.

242551171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 28.

The square root of 242551171 is about 15574.0544175240. The cubic root of 242551171 is about 623.6407118001.

The spelling of 242551171 in words is "two hundred forty-two million, five hundred fifty-one thousand, one hundred seventy-one".