43320421033 has 4 divisors (see below), whose sum is σ = 43322007508. Its totient is φ = 43318834560.

The previous prime is 43320421019. The next prime is 43320421099. The reversal of 43320421033 is 33012402334.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8065476864 + 35254944169 = 89808^2 + 187763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43320421033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43320420989 and 43320421007.

It is not an unprimeable number, because it can be changed into a prime (43320421433) 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, 751548 + ... + 807133.

It is an arithmetic number, because the mean of its divisors is an integer number (10830501877).

Almost surely, 2^43320421033 is an apocalyptic number.

It is an amenable number.

43320421033 is a deficient number, since it is larger than the sum of its proper divisors (1586475).

43320421033 is a wasteful number, since it uses less digits than its factorization.

43320421033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586474.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 43320421033 its reverse (33012402334), we get a palindrome (76332823367).

The spelling of 43320421033 in words is "forty-three billion, three hundred twenty million, four hundred twenty-one thousand, thirty-three".