43430108721 has 4 divisors (see below), whose sum is σ = 57906811632. Its totient is φ = 28953405812.

The previous prime is 43430108717. The next prime is 43430108767. The reversal of 43430108721 is 12780103434.

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.

It is a cyclic number.

It is not a de Polignac number, because 43430108721 - 2² = 43430108717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43430108791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7238351451 + ... + 7238351456.

It is an arithmetic number, because the mean of its divisors is an integer number (14476702908).

Almost surely, 2^43430108721 is an apocalyptic number.

It is an amenable number.

43430108721 is a deficient number, since it is larger than the sum of its proper divisors (14476702911).

43430108721 is a wasteful number, since it uses less digits than its factorization.

43430108721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14476702910.

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 43430108721 in words is "forty-three billion, four hundred thirty million, one hundred eight thousand, seven hundred twenty-one".