43540231169 has 2 divisors, whose sum is σ = 43540231170. Its totient is φ = 43540231168.

The previous prime is 43540231157. The next prime is 43540231247. The reversal of 43540231169 is 96113204534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23415120400 + 20125110769 = 153020^2 + 141863^2 .

It is a cyclic number.

It is not a de Polignac number, because 43540231169 - 2⁴ = 43540231153 is a prime.

It is a super-2 number, since 2×43540231169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43540231129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21770115584 + 21770115585.

It is an arithmetic number, because the mean of its divisors is an integer number (21770115585).

Almost surely, 2^43540231169 is an apocalyptic number.

It is an amenable number.

43540231169 is a deficient number, since it is larger than the sum of its proper divisors (1).

43540231169 is an equidigital number, since it uses as much as digits as its factorization.

43540231169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 43540231169 in words is "forty-three billion, five hundred forty million, two hundred thirty-one thousand, one hundred sixty-nine".