243332641 has 2 divisors, whose sum is σ = 243332642. Its totient is φ = 243332640.

The previous prime is 243332633. The next prime is 243332651. The reversal of 243332641 is 146233342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167573025 + 75759616 = 12945^2 + 8704^2 .

It is a cyclic number.

It is not a de Polignac number, because 243332641 - 2³ = 243332633 is a prime.

It is not a weakly prime, because it can be changed into another prime (243332651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121666320 + 121666321.

It is an arithmetic number, because the mean of its divisors is an integer number (121666321).

Almost surely, 2^243332641 is an apocalyptic number.

It is an amenable number.

243332641 is a deficient number, since it is larger than the sum of its proper divisors (1).

243332641 is an equidigital number, since it uses as much as digits as its factorization.

243332641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 28.

The square root of 243332641 is about 15599.1230843275. The cubic root of 243332641 is about 624.3097583069.

Adding to 243332641 its reverse (146233342), we get a palindrome (389565983).

The spelling of 243332641 in words is "two hundred forty-three million, three hundred thirty-two thousand, six hundred forty-one".