43523045321 has 4 divisors (see below), whose sum is σ = 49740623232. Its totient is φ = 37305467412.

The previous prime is 43523045317. The next prime is 43523045339. The reversal of 43523045321 is 12354032534.

43523045321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12354032534 = 2 ⋅6177016267.

It is a cyclic number.

It is not a de Polignac number, because 43523045321 - 2² = 43523045317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43523045021) 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, 3108788945 + ... + 3108788958.

It is an arithmetic number, because the mean of its divisors is an integer number (12435155808).

Almost surely, 2^43523045321 is an apocalyptic number.

It is an amenable number.

43523045321 is a deficient number, since it is larger than the sum of its proper divisors (6217577911).

43523045321 is an equidigital number, since it uses as much as digits as its factorization.

43523045321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217577910.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 43523045321 its reverse (12354032534), we get a palindrome (55877077855).

The spelling of 43523045321 in words is "forty-three billion, five hundred twenty-three million, forty-five thousand, three hundred twenty-one".