43381814173 has 4 divisors (see below), whose sum is σ = 43383046300. Its totient is φ = 43380582048.

The previous prime is 43381814149. The next prime is 43381814207. The reversal of 43381814173 is 37141818334.

It is a happy number.

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 35725914169 + 7655900004 = 189013^2 + 87498^2 .

It is a cyclic number.

It is not a de Polignac number, because 43381814173 - 2²⁵ = 43348259741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43081814173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561648 + ... + 634201.

It is an arithmetic number, because the mean of its divisors is an integer number (10845761575).

Almost surely, 2^43381814173 is an apocalyptic number.

It is an amenable number.

43381814173 is a deficient number, since it is larger than the sum of its proper divisors (1232127).

43381814173 is a wasteful number, since it uses less digits than its factorization.

43381814173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232126.

The product of its digits is 193536, while the sum is 43.

The spelling of 43381814173 in words is "forty-three billion, three hundred eighty-one million, eight hundred fourteen thousand, one hundred seventy-three".