2143111643 has 2 divisors, whose sum is σ = 2143111644. Its totient is φ = 2143111642.

The previous prime is 2143111603. The next prime is 2143111651. The reversal of 2143111643 is 3461113412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2143111643 - 2²⁶ = 2076002779 is a prime.

It is not a weakly prime, because it can be changed into another prime (2143111603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071555821 + 1071555822.

It is an arithmetic number, because the mean of its divisors is an integer number (1071555822).

Almost surely, 2^2143111643 is an apocalyptic number.

2143111643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143111643 is an equidigital number, since it uses as much as digits as its factorization.

2143111643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 2143111643 is about 46293.7538227351. The cubic root of 2143111643 is about 1289.2830266595.

The spelling of 2143111643 in words is "two billion, one hundred forty-three million, one hundred eleven thousand, six hundred forty-three".