43021020043 has 4 divisors (see below), whose sum is σ = 43205659848. Its totient is φ = 42836380240.

The previous prime is 43021020017. The next prime is 43021020067. The reversal of 43021020043 is 34002012034.

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 43021020043 - 2¹³ = 43021011851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43021020043.

It is not an unprimeable number, because it can be changed into a prime (43021020073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92319553 + ... + 92320018.

It is an arithmetic number, because the mean of its divisors is an integer number (10801414962).

Almost surely, 2^43021020043 is an apocalyptic number.

43021020043 is a deficient number, since it is larger than the sum of its proper divisors (184639805).

43021020043 is a wasteful number, since it uses less digits than its factorization.

43021020043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184639804.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 43021020043 its reverse (34002012034), we get a palindrome (77023032077).

The spelling of 43021020043 in words is "forty-three billion, twenty-one million, twenty thousand, forty-three".