43577071321 has 4 divisors (see below), whose sum is σ = 49802367232. Its totient is φ = 37351775412.

The previous prime is 43577071297. The next prime is 43577071331. The reversal of 43577071321 is 12317077534.

43577071321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 43577071321 - 2¹³ = 43577063129 is a prime.

It is a super-2 number, since 2×43577071321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43577071331) 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, 3112647945 + ... + 3112647958.

It is an arithmetic number, because the mean of its divisors is an integer number (12450591808).

Almost surely, 2^43577071321 is an apocalyptic number.

It is an amenable number.

43577071321 is a deficient number, since it is larger than the sum of its proper divisors (6225295911).

43577071321 is an equidigital number, since it uses as much as digits as its factorization.

43577071321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6225295910.

The product of its (nonzero) digits is 123480, while the sum is 40.

The spelling of 43577071321 in words is "forty-three billion, five hundred seventy-seven million, seventy-one thousand, three hundred twenty-one".