2005144243 has 2 divisors, whose sum is σ = 2005144244. Its totient is φ = 2005144242.

The previous prime is 2005144241. The next prime is 2005144247. The reversal of 2005144243 is 3424415002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2005144243 - 2¹ = 2005144241 is a prime.

Together with 2005144241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2005144241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002572121 + 1002572122.

It is an arithmetic number, because the mean of its divisors is an integer number (1002572122).

Almost surely, 2^2005144243 is an apocalyptic number.

2005144243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005144243 is an equidigital number, since it uses as much as digits as its factorization.

2005144243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2005144243 is about 44778.8369991897. The cubic root of 2005144243 is about 1261.0003484011. Note that the first 3 decimals are identical.

Adding to 2005144243 its reverse (3424415002), we get a palindrome (5429559245).

The spelling of 2005144243 in words is "two billion, five million, one hundred forty-four thousand, two hundred forty-three".