43131663 has 8 divisors (see below), whose sum is σ = 63898800. Its totient is φ = 28754424.

The previous prime is 43131659. The next prime is 43131679. The reversal of 43131663 is 36613134.

It is not a de Polignac number, because 43131663 - 2² = 43131659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1597469 = 43131663 / (4 + 3 + 1 + 3 + 1 + 6 + 6 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43131643) 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 7 ways as a sum of consecutive naturals, for example, 798708 + ... + 798761.

It is an arithmetic number, because the mean of its divisors is an integer number (7987350).

Almost surely, 2^43131663 is an apocalyptic number.

43131663 is a deficient number, since it is larger than the sum of its proper divisors (20767137).

43131663 is a wasteful number, since it uses less digits than its factorization.

43131663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597478 (or 1597472 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 43131663 is about 6567.4700608377. The cubic root of 43131663 is about 350.6970137193.

Adding to 43131663 its reverse (36613134), we get a palindrome (79744797).

The spelling of 43131663 in words is "forty-three million, one hundred thirty-one thousand, six hundred sixty-three".