242185171 has 2 divisors, whose sum is σ = 242185172. Its totient is φ = 242185170.

The previous prime is 242185129. The next prime is 242185199. The reversal of 242185171 is 171581242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242185171 is a prime.

It is not a weakly prime, because it can be changed into another prime (242183171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121092585 + 121092586.

It is an arithmetic number, because the mean of its divisors is an integer number (121092586).

Almost surely, 2^242185171 is an apocalyptic number.

242185171 is a deficient number, since it is larger than the sum of its proper divisors (1).

242185171 is an equidigital number, since it uses as much as digits as its factorization.

242185171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 31.

The square root of 242185171 is about 15562.2996693933. The cubic root of 242185171 is about 623.3268709394.

The spelling of 242185171 in words is "two hundred forty-two million, one hundred eighty-five thousand, one hundred seventy-one".