43530441021 has 6 divisors (see below), whose sum is σ = 62877303710. Its totient is φ = 29020294008.

The previous prime is 43530441011. The next prime is 43530441047. The reversal of 43530441021 is 12014403534.

It is a happy number.

43530441021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 43334748900 + 195692121 = 208170^2 + 13989^2 .

It is not a de Polignac number, because 43530441021 - 2¹⁹ = 43529916733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43530441011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2418357826 + ... + 2418357843.

Almost surely, 2^43530441021 is an apocalyptic number.

It is an amenable number.

43530441021 is a deficient number, since it is larger than the sum of its proper divisors (19346862689).

43530441021 is a wasteful number, since it uses less digits than its factorization.

43530441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836715675 (or 4836715672 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 43530441021 its reverse (12014403534), we get a palindrome (55544844555).

The spelling of 43530441021 in words is "forty-three billion, five hundred thirty million, four hundred forty-one thousand, twenty-one".