43531361 has 2 divisors, whose sum is σ = 43531362. Its totient is φ = 43531360.

The previous prime is 43531309. The next prime is 43531403. The reversal of 43531361 is 16313534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39450961 + 4080400 = 6281^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 43531361 - 2¹⁰ = 43530337 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43531361.

It is not a weakly prime, because it can be changed into another prime (43531661) 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 as a sum of consecutive naturals, namely, 21765680 + 21765681.

It is an arithmetic number, because the mean of its divisors is an integer number (21765681).

Almost surely, 2^43531361 is an apocalyptic number.

It is an amenable number.

43531361 is a deficient number, since it is larger than the sum of its proper divisors (1).

43531361 is an equidigital number, since it uses as much as digits as its factorization.

43531361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 26.

The square root of 43531361 is about 6597.8300220603. The cubic root of 43531361 is about 351.7769791868.

Adding to 43531361 its reverse (16313534), we get a palindrome (59844895).

The spelling of 43531361 in words is "forty-three million, five hundred thirty-one thousand, three hundred sixty-one".