243253441 has 2 divisors, whose sum is σ = 243253442. Its totient is φ = 243253440.

The previous prime is 243253393. The next prime is 243253457. The reversal of 243253441 is 144352342.

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., 243235216 + 18225 = 15596^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 243253441 - 2¹⁵ = 243220673 is a prime.

It is not a weakly prime, because it can be changed into another prime (243251441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121626720 + 121626721.

It is an arithmetic number, because the mean of its divisors is an integer number (121626721).

Almost surely, 2^243253441 is an apocalyptic number.

It is an amenable number.

243253441 is a deficient number, since it is larger than the sum of its proper divisors (1).

243253441 is an equidigital number, since it uses as much as digits as its factorization.

243253441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 28.

The square root of 243253441 is about 15596.5842734876. The cubic root of 243253441 is about 624.2420174315.

The spelling of 243253441 in words is "two hundred forty-three million, two hundred fifty-three thousand, four hundred forty-one".