2143240117 has 2 divisors, whose sum is σ = 2143240118. Its totient is φ = 2143240116.

The previous prime is 2143240111. The next prime is 2143240241. The reversal of 2143240117 is 7110423412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2097731601 + 45508516 = 45801^2 + 6746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143240117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2143240091 and 2143240100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143240111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071620058 + 1071620059.

It is an arithmetic number, because the mean of its divisors is an integer number (1071620059).

Almost surely, 2^2143240117 is an apocalyptic number.

It is an amenable number.

2143240117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143240117 is an equidigital number, since it uses as much as digits as its factorization.

2143240117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2143240117 is about 46295.1413973432. The cubic root of 2143240117 is about 1289.3087892056.

Adding to 2143240117 its reverse (7110423412), we get a palindrome (9253663529).

The spelling of 2143240117 in words is "two billion, one hundred forty-three million, two hundred forty thousand, one hundred seventeen".