43161139 has 8 divisors (see below), whose sum is σ = 49366880. Its totient is φ = 36965376.

The previous prime is 43161119. The next prime is 43161149. The reversal of 43161139 is 93116134.

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

It is not a de Polignac number, because 43161139 - 2¹¹ = 43159091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43161119) 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, 14707 + ... + 17395.

It is an arithmetic number, because the mean of its divisors is an integer number (6170860).

Almost surely, 2^43161139 is an apocalyptic number.

43161139 is a deficient number, since it is larger than the sum of its proper divisors (6205741).

43161139 is a wasteful number, since it uses less digits than its factorization.

43161139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989.

The product of its digits is 1944, while the sum is 28.

The square root of 43161139 is about 6569.7137684986. The cubic root of 43161139 is about 350.7768838237.

The spelling of 43161139 in words is "forty-three million, one hundred sixty-one thousand, one hundred thirty-nine".