43231121 has 2 divisors, whose sum is σ = 43231122. Its totient is φ = 43231120.

The previous prime is 43231087. The next prime is 43231171. The reversal of 43231121 is 12113234.

43231121 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 can be written as a sum of positive squares in only one way, i.e., 41422096 + 1809025 = 6436^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 43231121 - 2¹⁴ = 43214737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43231121.

It is not a weakly prime, because it can be changed into another prime (43231171) 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, 21615560 + 21615561.

It is an arithmetic number, because the mean of its divisors is an integer number (21615561).

Almost surely, 2^43231121 is an apocalyptic number.

It is an amenable number.

43231121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43231121 is an equidigital number, since it uses as much as digits as its factorization.

43231121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 17.

The square root of 43231121 is about 6575.0377185230. The cubic root of 43231121 is about 350.9663660978.

Adding to 43231121 its reverse (12113234), we get a palindrome (55344355).

The spelling of 43231121 in words is "forty-three million, two hundred thirty-one thousand, one hundred twenty-one".