243203041 has 2 divisors, whose sum is σ = 243203042. Its totient is φ = 243203040.

The previous prime is 243203039. The next prime is 243203053. The reversal of 243203041 is 140302342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157251600 + 85951441 = 12540^2 + 9271^2 .

It is a cyclic number.

It is not a de Polignac number, because 243203041 - 2¹ = 243203039 is a prime.

Together with 243203039, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243203341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121601520 + 121601521.

It is an arithmetic number, because the mean of its divisors is an integer number (121601521).

Almost surely, 2^243203041 is an apocalyptic number.

It is an amenable number.

243203041 is a deficient number, since it is larger than the sum of its proper divisors (1).

243203041 is an equidigital number, since it uses as much as digits as its factorization.

243203041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243203041 is about 15594.9684513948. The cubic root of 243203041 is about 624.1989019458.

Adding to 243203041 its reverse (140302342), we get a palindrome (383505383).

The spelling of 243203041 in words is "two hundred forty-three million, two hundred three thousand, forty-one".