43321042321 has 16 divisors (see below), whose sum is σ = 46488349440. Its totient is φ = 40243357440.

The previous prime is 43321042243. The next prime is 43321042351. The reversal of 43321042321 is 12324012334.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43321042321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43321042351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1872601 + ... + 1895593.

It is an arithmetic number, because the mean of its divisors is an integer number (2905521840).

Almost surely, 2^43321042321 is an apocalyptic number.

It is an amenable number.

43321042321 is a deficient number, since it is larger than the sum of its proper divisors (3167307119).

43321042321 is a wasteful number, since it uses less digits than its factorization.

43321042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24936.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 43321042321 its reverse (12324012334), we get a palindrome (55645054655).

The spelling of 43321042321 in words is "forty-three billion, three hundred twenty-one million, forty-two thousand, three hundred twenty-one".