2142340243 has 2 divisors, whose sum is σ = 2142340244. Its totient is φ = 2142340242.

The previous prime is 2142340223. The next prime is 2142340279. The reversal of 2142340243 is 3420432412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142340243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2142340223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071170121 + 1071170122.

It is an arithmetic number, because the mean of its divisors is an integer number (1071170122).

Almost surely, 2^2142340243 is an apocalyptic number.

2142340243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142340243 is an equidigital number, since it uses as much as digits as its factorization.

2142340243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 2142340243 is about 46285.4214953261. The cubic root of 2142340243 is about 1289.1283182348.

Adding to 2142340243 its reverse (3420432412), we get a palindrome (5562772655).

The spelling of 2142340243 in words is "two billion, one hundred forty-two million, three hundred forty thousand, two hundred forty-three".