243412181 has 2 divisors, whose sum is σ = 243412182. Its totient is φ = 243412180.

The previous prime is 243412163. The next prime is 243412187. The reversal of 243412181 is 181214342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235622500 + 7789681 = 15350^2 + 2791^2 .

It is a cyclic number.

It is not a de Polignac number, because 243412181 - 2²² = 239217877 is a prime.

It is a super-2 number, since 2×243412181² = 118498979718353522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243412181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243412187) 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, 121706090 + 121706091.

It is an arithmetic number, because the mean of its divisors is an integer number (121706091).

Almost surely, 2^243412181 is an apocalyptic number.

It is an amenable number.

243412181 is a deficient number, since it is larger than the sum of its proper divisors (1).

243412181 is an equidigital number, since it uses as much as digits as its factorization.

243412181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 26.

The square root of 243412181 is about 15601.6723783061. The cubic root of 243412181 is about 624.3777751970.

The spelling of 243412181 in words is "two hundred forty-three million, four hundred twelve thousand, one hundred eighty-one".