43131573 has 12 divisors (see below), whose sum is σ = 62757708. Its totient is φ = 28543680.

The previous prime is 43131553. The next prime is 43131581. The reversal of 43131573 is 37513134.

It can be written as a sum of positive squares in 2 ways, for example, as 24830289 + 18301284 = 4983^2 + 4278^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43131573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43131503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16258 + ... + 18723.

It is an arithmetic number, because the mean of its divisors is an integer number (5229809).

Almost surely, 2^43131573 is an apocalyptic number.

It is an amenable number.

43131573 is a deficient number, since it is larger than the sum of its proper divisors (19626135).

43131573 is a wasteful number, since it uses less digits than its factorization.

43131573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35124 (or 35121 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 43131573 is about 6567.4632088806. The cubic root of 43131573 is about 350.6967697937.

It can be divided in two parts, 4313 and 1573, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 43131573 in words is "forty-three million, one hundred thirty-one thousand, five hundred seventy-three".