43363561 has 2 divisors, whose sum is σ = 43363562. Its totient is φ = 43363560.

The previous prime is 43363531. The next prime is 43363589. The reversal of 43363561 is 16536334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34152336 + 9211225 = 5844^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 43363561 - 2¹⁹ = 42839273 is a prime.

It is not a weakly prime, because it can be changed into another prime (43363511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21681780 + 21681781.

It is an arithmetic number, because the mean of its divisors is an integer number (21681781).

Almost surely, 2^43363561 is an apocalyptic number.

It is an amenable number.

43363561 is a deficient number, since it is larger than the sum of its proper divisors (1).

43363561 is an equidigital number, since it uses as much as digits as its factorization.

43363561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 31.

The square root of 43363561 is about 6585.1014418914. The cubic root of 43363561 is about 351.3243998375.

Adding to 43363561 its reverse (16536334), we get a palindrome (59899895).

The spelling of 43363561 in words is "forty-three million, three hundred sixty-three thousand, five hundred sixty-one".