43138375 has 24 divisors (see below), whose sum is σ = 62635248. Its totient is φ = 29576400.

The previous prime is 43138373. The next prime is 43138397. The reversal of 43138375 is 57383134.

43138375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43138375 - 2¹ = 43138373 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 43138375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43138373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2604 + ... + 9646.

It is an arithmetic number, because the mean of its divisors is an integer number (2609802).

Almost surely, 2^43138375 is an apocalyptic number.

43138375 is a deficient number, since it is larger than the sum of its proper divisors (19496873).

43138375 is an equidigital number, since it uses as much as digits as its factorization.

43138375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7072 (or 7055 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 43138375 is about 6567.9810444306. The cubic root of 43138375 is about 350.7152041939.

The spelling of 43138375 in words is "forty-three million, one hundred thirty-eight thousand, three hundred seventy-five".