43320140321 has 4 divisors (see below), whose sum is σ = 43345729812. Its totient is φ = 43294550832.

The previous prime is 43320140293. The next prime is 43320140329. The reversal of 43320140321 is 12304102334.

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 15089419921 + 28230720400 = 122839^2 + 168020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43320140321 is a prime.

It is a super-2 number, since 2×43320140321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43320140329) 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, 12792206 + ... + 12795591.

It is an arithmetic number, because the mean of its divisors is an integer number (10836432453).

Almost surely, 2^43320140321 is an apocalyptic number.

It is an amenable number.

43320140321 is a deficient number, since it is larger than the sum of its proper divisors (25589491).

43320140321 is a wasteful number, since it uses less digits than its factorization.

43320140321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25589490.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 43320140321 its reverse (12304102334), we get a palindrome (55624242655).

The spelling of 43320140321 in words is "forty-three billion, three hundred twenty million, one hundred forty thousand, three hundred twenty-one".