43516560221 has 4 divisors (see below), whose sum is σ = 43588252032. Its totient is φ = 43444868412.

The previous prime is 43516560193. The next prime is 43516560277. The reversal of 43516560221 is 12206561534.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43516560221 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 (43516560121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35844995 + ... + 35846208.

It is an arithmetic number, because the mean of its divisors is an integer number (10897063008).

Almost surely, 2^43516560221 is an apocalyptic number.

It is an amenable number.

43516560221 is a deficient number, since it is larger than the sum of its proper divisors (71691811).

43516560221 is an equidigital number, since it uses as much as digits as its factorization.

43516560221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71691810.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 43516560221 in words is "forty-three billion, five hundred sixteen million, five hundred sixty thousand, two hundred twenty-one".