43381513601 has 4 divisors (see below), whose sum is σ = 43389073152. Its totient is φ = 43373954052.

The previous prime is 43381513547. The next prime is 43381513607. The reversal of 43381513601 is 10631518334.

43381513601 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43381513601 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 (43381513607) 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, 3771161 + ... + 3782646.

It is an arithmetic number, because the mean of its divisors is an integer number (10847268288).

Almost surely, 2^43381513601 is an apocalyptic number.

It is an amenable number.

43381513601 is a deficient number, since it is larger than the sum of its proper divisors (7559551).

43381513601 is an equidigital number, since it uses as much as digits as its factorization.

43381513601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559550.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 43381513601 in words is "forty-three billion, three hundred eighty-one million, five hundred thirteen thousand, six hundred one".