243402241 has 2 divisors, whose sum is σ = 243402242. Its totient is φ = 243402240.

The previous prime is 243402167. The next prime is 243402251. The reversal of 243402241 is 142204342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228161025 + 15241216 = 15105^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 243402241 - 2⁹ = 243401729 is a prime.

It is not a weakly prime, because it can be changed into another prime (243402251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121701120 + 121701121.

It is an arithmetic number, because the mean of its divisors is an integer number (121701121).

Almost surely, 2^243402241 is an apocalyptic number.

It is an amenable number.

243402241 is a deficient number, since it is larger than the sum of its proper divisors (1).

243402241 is an equidigital number, since it uses as much as digits as its factorization.

243402241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 243402241 is about 15601.3538194607. The cubic root of 243402241 is about 624.3692760338.

Adding to 243402241 its reverse (142204342), we get a palindrome (385606583).

The spelling of 243402241 in words is "two hundred forty-three million, four hundred two thousand, two hundred forty-one".