43209266221 has 16 divisors (see below), whose sum is σ = 47433351168. Its totient is φ = 39035230000.

The previous prime is 43209266189. The next prime is 43209266257. The reversal of 43209266221 is 12266290234.

It is a cyclic number.

It is not a de Polignac number, because 43209266221 - 2⁵ = 43209266189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43209266921) 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 in 15 ways as a sum of consecutive naturals, for example, 1205460 + ... + 1240786.

It is an arithmetic number, because the mean of its divisors is an integer number (2964584448).

Almost surely, 2^43209266221 is an apocalyptic number.

It is an amenable number.

43209266221 is a deficient number, since it is larger than the sum of its proper divisors (4224084947).

43209266221 is a wasteful number, since it uses less digits than its factorization.

43209266221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36032.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 43209266221 in words is "forty-three billion, two hundred nine million, two hundred sixty-six thousand, two hundred twenty-one".