43131379 has 4 divisors (see below), whose sum is σ = 43534584. Its totient is φ = 42728176.

The previous prime is 43131367. The next prime is 43131391. The reversal of 43131379 is 97313134.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (43131367) and next prime (43131391).

It is a cyclic number.

It is not a de Polignac number, because 43131379 - 2¹³ = 43123187 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 43131379.

It is not an unprimeable number, because it can be changed into a prime (43131079) 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, 201442 + ... + 201655.

It is an arithmetic number, because the mean of its divisors is an integer number (10883646).

Almost surely, 2^43131379 is an apocalyptic number.

43131379 is a deficient number, since it is larger than the sum of its proper divisors (403205).

43131379 is a wasteful number, since it uses less digits than its factorization.

43131379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403204.

The product of its digits is 6804, while the sum is 31.

The square root of 43131379 is about 6567.4484390820. The cubic root of 43131379 is about 350.6962439973.

The spelling of 43131379 in words is "forty-three million, one hundred thirty-one thousand, three hundred seventy-nine".