243265441 has 2 divisors, whose sum is σ = 243265442. Its totient is φ = 243265440.

The previous prime is 243265439. The next prime is 243265489. The reversal of 243265441 is 144562342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156775441 + 86490000 = 12521^2 + 9300^2 .

It is a cyclic number.

It is not a de Polignac number, because 243265441 - 2¹ = 243265439 is a prime.

Together with 243265439, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_13330696 and since 243265441 and 13330696 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (243265541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121632720 + 121632721.

It is an arithmetic number, because the mean of its divisors is an integer number (121632721).

Almost surely, 2^243265441 is an apocalyptic number.

It is an amenable number.

243265441 is a deficient number, since it is larger than the sum of its proper divisors (1).

243265441 is an equidigital number, since it uses as much as digits as its factorization.

243265441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 31.

The square root of 243265441 is about 15596.9689683605. The cubic root of 243265441 is about 624.2522821455.

The spelling of 243265441 in words is "two hundred forty-three million, two hundred sixty-five thousand, four hundred forty-one".