43534321 has 2 divisors, whose sum is σ = 43534322. Its totient is φ = 43534320.

The previous prime is 43534319. The next prime is 43534327. The reversal of 43534321 is 12343534.

43534321 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., 41460721 + 2073600 = 6439^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 43534321 - 2¹ = 43534319 is a prime.

Together with 43534319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43534327) 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, 21767160 + 21767161.

It is an arithmetic number, because the mean of its divisors is an integer number (21767161).

Almost surely, 2^43534321 is an apocalyptic number.

It is an amenable number.

43534321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43534321 is an equidigital number, since it uses as much as digits as its factorization.

43534321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 25.

The square root of 43534321 is about 6598.0543344231. The cubic root of 43534321 is about 351.7849522605.

Adding to 43534321 its reverse (12343534), we get a palindrome (55877855).

The spelling of 43534321 in words is "forty-three million, five hundred thirty-four thousand, three hundred twenty-one".