43563354421253 has 2 divisors, whose sum is σ = 43563354421254. Its totient is φ = 43563354421252.

The previous prime is 43563354421243. The next prime is 43563354421259. The reversal of 43563354421253 is 35212445336534.

43563354421253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25691445980929 + 17871908440324 = 5068673^2 + 4227518^2 .

It is a cyclic number.

It is not a de Polignac number, because 43563354421253 - 2⁸ = 43563354420997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43563354421259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21781677210626 + 21781677210627.

It is an arithmetic number, because the mean of its divisors is an integer number (21781677210627).

Almost surely, 2^{43563354421253} is an apocalyptic number.

It is an amenable number.

43563354421253 is a deficient number, since it is larger than the sum of its proper divisors (1).

43563354421253 is an equidigital number, since it uses as much as digits as its factorization.

43563354421253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552000, while the sum is 50.

Adding to 43563354421253 its reverse (35212445336534), we get a palindrome (78775799757787).

The spelling of 43563354421253 in words is "forty-three trillion, five hundred sixty-three billion, three hundred fifty-four million, four hundred twenty-one thousand, two hundred fifty-three".