43205505361 has 2 divisors, whose sum is σ = 43205505362. Its totient is φ = 43205505360.

The previous prime is 43205505281. The next prime is 43205505397. The reversal of 43205505361 is 16350550234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37468957761 + 5736547600 = 193569^2 + 75740^2 .

It is a cyclic number.

It is not a de Polignac number, because 43205505361 - 2¹³ = 43205497169 is a prime.

It is not a weakly prime, because it can be changed into another prime (43205508361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21602752680 + 21602752681.

It is an arithmetic number, because the mean of its divisors is an integer number (21602752681).

Almost surely, 2^43205505361 is an apocalyptic number.

It is an amenable number.

43205505361 is a deficient number, since it is larger than the sum of its proper divisors (1).

43205505361 is an equidigital number, since it uses as much as digits as its factorization.

43205505361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 43205505361 in words is "forty-three billion, two hundred five million, five hundred five thousand, three hundred sixty-one".