2143234543 has 4 divisors (see below), whose sum is σ = 2167315920. Its totient is φ = 2119153168.

The previous prime is 2143234537. The next prime is 2143234559. The reversal of 2143234543 is 3454323412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2143234543 - 2¹⁷ = 2143103471 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143234243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12040555 + ... + 12040732.

It is an arithmetic number, because the mean of its divisors is an integer number (541828980).

Almost surely, 2^2143234543 is an apocalyptic number.

2143234543 is a deficient number, since it is larger than the sum of its proper divisors (24081377).

2143234543 is an equidigital number, since it uses as much as digits as its factorization.

2143234543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24081376.

The product of its digits is 34560, while the sum is 31.

The square root of 2143234543 is about 46295.0811966023. The cubic root of 2143234543 is about 1289.3076714877.

Adding to 2143234543 its reverse (3454323412), we get a palindrome (5597557955).

The spelling of 2143234543 in words is "two billion, one hundred forty-three million, two hundred thirty-four thousand, five hundred forty-three".