2143240247 has 2 divisors, whose sum is σ = 2143240248. Its totient is φ = 2143240246.

The previous prime is 2143240241. The next prime is 2143240259. The reversal of 2143240247 is 7420423412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143240247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143240241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071620123 + 1071620124.

It is an arithmetic number, because the mean of its divisors is an integer number (1071620124).

Almost surely, 2^2143240247 is an apocalyptic number.

2143240247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143240247 is an equidigital number, since it uses as much as digits as its factorization.

2143240247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 2143240247 is about 46295.1428013782. The cubic root of 2143240247 is about 1289.3088152736.

Adding to 2143240247 its reverse (7420423412), we get a palindrome (9563663659).

The spelling of 2143240247 in words is "two billion, one hundred forty-three million, two hundred forty thousand, two hundred forty-seven".