43194459541 has 2 divisors, whose sum is σ = 43194459542. Its totient is φ = 43194459540.

The previous prime is 43194459481. The next prime is 43194459557. The reversal of 43194459541 is 14595449134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42871358916 + 323100625 = 207054^2 + 17975^2 .

It is a cyclic number.

It is not a de Polignac number, because 43194459541 - 2¹⁵ = 43194426773 is a prime.

It is a super-2 number, since 2×43194459541² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43194459041) 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, 21597229770 + 21597229771.

It is an arithmetic number, because the mean of its divisors is an integer number (21597229771).

Almost surely, 2^43194459541 is an apocalyptic number.

It is an amenable number.

43194459541 is a deficient number, since it is larger than the sum of its proper divisors (1).

43194459541 is an equidigital number, since it uses as much as digits as its factorization.

43194459541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 49.

The spelling of 43194459541 in words is "forty-three billion, one hundred ninety-four million, four hundred fifty-nine thousand, five hundred forty-one".