4143543121 has 2 divisors, whose sum is σ = 4143543122. Its totient is φ = 4143543120.

The previous prime is 4143543091. The next prime is 4143543139. The reversal of 4143543121 is 1213453414.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2368184896 + 1775358225 = 48664^2 + 42135^2 .

It is a cyclic number.

It is not a de Polignac number, because 4143543121 - 2²⁵ = 4109988689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4143543121.

It is not a weakly prime, because it can be changed into another prime (4143544121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071771560 + 2071771561.

It is an arithmetic number, because the mean of its divisors is an integer number (2071771561).

Almost surely, 2^4143543121 is an apocalyptic number.

It is an amenable number.

4143543121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4143543121 is an equidigital number, since it uses as much as digits as its factorization.

4143543121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 28.

The square root of 4143543121 is about 64370.3590249425. The cubic root of 4143543121 is about 1606.1667122989.

Adding to 4143543121 its reverse (1213453414), we get a palindrome (5356996535).

The spelling of 4143543121 in words is "four billion, one hundred forty-three million, five hundred forty-three thousand, one hundred twenty-one".