243341381 has 2 divisors, whose sum is σ = 243341382. Its totient is φ = 243341380.

The previous prime is 243341369. The next prime is 243341393. The reversal of 243341381 is 183143342.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (243341369) and next prime (243341393).

It can be written as a sum of positive squares in only one way, i.e., 214622500 + 28718881 = 14650^2 + 5359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243341381 is a prime.

It is a super-2 number, since 2×243341381² = 118430055413974322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243341981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121670690 + 121670691.

It is an arithmetic number, because the mean of its divisors is an integer number (121670691).

Almost surely, 2^243341381 is an apocalyptic number.

It is an amenable number.

243341381 is a deficient number, since it is larger than the sum of its proper divisors (1).

243341381 is an equidigital number, since it uses as much as digits as its factorization.

243341381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 243341381 is about 15599.4032257648. The cubic root of 243341381 is about 624.3172328514.

The spelling of 243341381 in words is "two hundred forty-three million, three hundred forty-one thousand, three hundred eighty-one".