43487533 has 2 divisors, whose sum is σ = 43487534. Its totient is φ = 43487532.

The previous prime is 43487531. The next prime is 43487539. The reversal of 43487533 is 33578434.

43487533 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., 32285124 + 11202409 = 5682^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 43487533 - 2¹ = 43487531 is a prime.

Together with 43487531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 43487492 and 43487501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43487531) 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, 21743766 + 21743767.

It is an arithmetic number, because the mean of its divisors is an integer number (21743767).

Almost surely, 2^43487533 is an apocalyptic number.

It is an amenable number.

43487533 is a deficient number, since it is larger than the sum of its proper divisors (1).

43487533 is an equidigital number, since it uses as much as digits as its factorization.

43487533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 37.

The square root of 43487533 is about 6594.5077905785. The cubic root of 43487533 is about 351.6588815040.

Subtracting from 43487533 its reverse (33578434), we obtain a palindrome (9909099).

It can be divided in two parts, 4348 and 7533, that added together give a square (11881 = 109²).

The spelling of 43487533 in words is "forty-three million, four hundred eighty-seven thousand, five hundred thirty-three".