43138994271 has 16 divisors (see below), whose sum is σ = 58377848160. Its totient is φ = 28330698240.

The previous prime is 43138994267. The next prime is 43138994279. The reversal of 43138994271 is 17249983134.

It is a happy number.

It is not a de Polignac number, because 43138994271 - 2² = 43138994267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43138994279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59835 + ... + 299763.

It is an arithmetic number, because the mean of its divisors is an integer number (3648615510).

Almost surely, 2^43138994271 is an apocalyptic number.

43138994271 is a deficient number, since it is larger than the sum of its proper divisors (15238853889).

43138994271 is a wasteful number, since it uses less digits than its factorization.

43138994271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240826.

The product of its digits is 1306368, while the sum is 51.

The spelling of 43138994271 in words is "forty-three billion, one hundred thirty-eight million, nine hundred ninety-four thousand, two hundred seventy-one".