43542324197 has 2 divisors, whose sum is σ = 43542324198. Its totient is φ = 43542324196.

The previous prime is 43542324191. The next prime is 43542324227. The reversal of 43542324197 is 79142324534.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24365336836 + 19176987361 = 156094^2 + 138481^2 .

It is a cyclic number.

It is not a de Polignac number, because 43542324197 - 2¹⁴ = 43542307813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43542324191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21771162098 + 21771162099.

It is an arithmetic number, because the mean of its divisors is an integer number (21771162099).

Almost surely, 2^43542324197 is an apocalyptic number.

It is an amenable number.

43542324197 is a deficient number, since it is larger than the sum of its proper divisors (1).

43542324197 is an equidigital number, since it uses as much as digits as its factorization.

43542324197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 44.

The spelling of 43542324197 in words is "forty-three billion, five hundred forty-two million, three hundred twenty-four thousand, one hundred ninety-seven".