43131243 has 4 divisors (see below), whose sum is σ = 57508328. Its totient is φ = 28754160.

The previous prime is 43131239. The next prime is 43131259. The reversal of 43131243 is 34213134.

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

It is not a de Polignac number, because 43131243 - 2² = 43131239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43131223) 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 3 ways as a sum of consecutive naturals, for example, 7188538 + ... + 7188543.

It is an arithmetic number, because the mean of its divisors is an integer number (14377082).

Almost surely, 2^43131243 is an apocalyptic number.

43131243 is a deficient number, since it is larger than the sum of its proper divisors (14377085).

43131243 is a wasteful number, since it uses less digits than its factorization.

43131243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14377084.

The product of its digits is 864, while the sum is 21.

The square root of 43131243 is about 6567.4380849765. The cubic root of 43131243 is about 350.6958753968.

Adding to 43131243 its reverse (34213134), we get a palindrome (77344377).

The spelling of 43131243 in words is "forty-three million, one hundred thirty-one thousand, two hundred forty-three".