43054566209 has 4 divisors (see below), whose sum is σ = 43318704816. Its totient is φ = 42790427604.

The previous prime is 43054566199. The next prime is 43054566223. The reversal of 43054566209 is 90266545034.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90266545034 = 2 ⋅45133272517.

It is a cyclic number.

It is not a de Polignac number, because 43054566209 - 2⁴ = 43054566193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43054566209.

It is not an unprimeable number, because it can be changed into a prime (43054566229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132069059 + ... + 132069384.

It is an arithmetic number, because the mean of its divisors is an integer number (10829676204).

Almost surely, 2^43054566209 is an apocalyptic number.

It is an amenable number.

43054566209 is a deficient number, since it is larger than the sum of its proper divisors (264138607).

43054566209 is a wasteful number, since it uses less digits than its factorization.

43054566209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264138606.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 43054566209 in words is "forty-three billion, fifty-four million, five hundred sixty-six thousand, two hundred nine".