43231387 has 2 divisors, whose sum is σ = 43231388. Its totient is φ = 43231386.

The previous prime is 43231379. The next prime is 43231417. The reversal of 43231387 is 78313234.

43231387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43231387 - 2³ = 43231379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43231087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21615693 + 21615694.

It is an arithmetic number, because the mean of its divisors is an integer number (21615694).

Almost surely, 2^43231387 is an apocalyptic number.

43231387 is a deficient number, since it is larger than the sum of its proper divisors (1).

43231387 is an equidigital number, since it uses as much as digits as its factorization.

43231387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 43231387 is about 6575.0579465127. The cubic root of 43231387 is about 350.9670859254.

The spelling of 43231387 in words is "forty-three million, two hundred thirty-one thousand, three hundred eighty-seven".