242252181 has 8 divisors (see below), whose sum is σ = 358892160. Its totient is φ = 161501436.

The previous prime is 242252177. The next prime is 242252191. The reversal of 242252181 is 181252242.

It is not a de Polignac number, because 242252181 - 2² = 242252177 is a prime.

It is a super-2 number, since 2×242252181² = 117372238398513522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8972303 = 242252181 / (2 + 4 + 2 + 2 + 5 + 2 + 1 + 8 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242252141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4486125 + ... + 4486178.

It is an arithmetic number, because the mean of its divisors is an integer number (44861520).

Almost surely, 2^242252181 is an apocalyptic number.

It is an amenable number.

242252181 is a deficient number, since it is larger than the sum of its proper divisors (116639979).

242252181 is an equidigital number, since it uses as much as digits as its factorization.

242252181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972312 (or 8972306 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 242252181 is about 15564.4524799300. The cubic root of 242252181 is about 623.3843548909.

The spelling of 242252181 in words is "two hundred forty-two million, two hundred fifty-two thousand, one hundred eighty-one".