2111430643 has 16 divisors (see below), whose sum is σ = 2429447680. Its totient is φ = 1797552000.

The previous prime is 2111430569. The next prime is 2111430653. The reversal of 2111430643 is 3460341112.

It is a cyclic number.

It is not a de Polignac number, because 2111430643 - 2²⁹ = 1574559731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111430653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739168 + ... + 742018.

It is an arithmetic number, because the mean of its divisors is an integer number (151840480).

Almost surely, 2^2111430643 is an apocalyptic number.

2111430643 is a deficient number, since it is larger than the sum of its proper divisors (318017037).

2111430643 is a wasteful number, since it uses less digits than its factorization.

2111430643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2111430643 is about 45950.3062340176. The cubic root of 2111430643 is about 1282.8984292045.

Adding to 2111430643 its reverse (3460341112), we get a palindrome (5571771755).

The spelling of 2111430643 in words is "two billion, one hundred eleven million, four hundred thirty thousand, six hundred forty-three".