43601344021 has 2 divisors, whose sum is σ = 43601344022. Its totient is φ = 43601344020.

The previous prime is 43601343983. The next prime is 43601344049. The reversal of 43601344021 is 12044310634.

It is an a-pointer prime, because the next prime (43601344049) can be obtained adding 43601344021 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23412060100 + 20189283921 = 153010^2 + 142089^2 .

It is a cyclic number.

It is not a de Polignac number, because 43601344021 - 2⁹ = 43601343509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43601344081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21800672010 + 21800672011.

It is an arithmetic number, because the mean of its divisors is an integer number (21800672011).

Almost surely, 2^43601344021 is an apocalyptic number.

It is an amenable number.

43601344021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43601344021 is an equidigital number, since it uses as much as digits as its factorization.

43601344021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 43601344021 its reverse (12044310634), we get a palindrome (55645654655).

The spelling of 43601344021 in words is "forty-three billion, six hundred one million, three hundred forty-four thousand, twenty-one".