242171811 has 24 divisors (see below), whose sum is σ = 400231520. Its totient is φ = 138226176.

The previous prime is 242171803. The next prime is 242171821. The reversal of 242171811 is 118171242.

It is not a de Polignac number, because 242171811 - 2³ = 242171803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242171821) 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 in 23 ways as a sum of consecutive naturals, for example, 74835 + ... + 78003.

Almost surely, 2^242171811 is an apocalyptic number.

242171811 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

242171811 is a deficient number, since it is larger than the sum of its proper divisors (158059709).

242171811 is a wasteful number, since it uses less digits than its factorization.

242171811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395 (or 4392 counting only the distinct ones).

The product of its digits is 896, while the sum is 27.

The square root of 242171811 is about 15561.8704210002. The cubic root of 242171811 is about 623.3154089107.

The spelling of 242171811 in words is "two hundred forty-two million, one hundred seventy-one thousand, eight hundred eleven".