201043243 has 2 divisors, whose sum is σ = 201043244. Its totient is φ = 201043242.

The previous prime is 201043217. The next prime is 201043261. The reversal of 201043243 is 342340102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201043243 - 2²¹ = 198946091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201043243.

It is not a weakly prime, because it can be changed into another prime (201043273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521621 + 100521622.

It is an arithmetic number, because the mean of its divisors is an integer number (100521622).

Almost surely, 2^201043243 is an apocalyptic number.

201043243 is a deficient number, since it is larger than the sum of its proper divisors (1).

201043243 is an equidigital number, since it uses as much as digits as its factorization.

201043243 is an odious number, because the sum of its binary digits is odd.

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

The square root of 201043243 is about 14178.9718597647. The cubic root of 201043243 is about 585.8186051095.

Adding to 201043243 its reverse (342340102), we get a palindrome (543383345).

The spelling of 201043243 in words is "two hundred one million, forty-three thousand, two hundred forty-three".