43113240721 has 8 divisors (see below), whose sum is σ = 44990616384. Its totient is φ = 41236105680.

The previous prime is 43113240719. The next prime is 43113240739. The reversal of 43113240721 is 12704231134.

43113240721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43113240721 - 2¹ = 43113240719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43113240721.

It is not an unprimeable number, because it can be changed into a prime (43113240761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372186 + ... + 474076.

It is an arithmetic number, because the mean of its divisors is an integer number (5623827048).

Almost surely, 2^43113240721 is an apocalyptic number.

It is an amenable number.

43113240721 is a deficient number, since it is larger than the sum of its proper divisors (1877375663).

43113240721 is a wasteful number, since it uses less digits than its factorization.

43113240721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120311.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 43113240721 its reverse (12704231134), we get a palindrome (55817471855).

The spelling of 43113240721 in words is "forty-three billion, one hundred thirteen million, two hundred forty thousand, seven hundred twenty-one".