43043042310221 has 4 divisors (see below), whose sum is σ = 43043485615452. Its totient is φ = 43042599004992.

The previous prime is 43043042310199. The next prime is 43043042310241. The reversal of 43043042310221 is 12201324034034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37367069605321 + 5675972704900 = 6112861^2 + 2382430^2 .

It is a cyclic number.

It is not a de Polignac number, because 43043042310221 - 2²⁶ = 43042975201357 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 (43043042310241) 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, 221506940 + ... + 221701173.

It is an arithmetic number, because the mean of its divisors is an integer number (10760871403863).

Almost surely, 2^{43043042310221} is an apocalyptic number.

It is an amenable number.

43043042310221 is a deficient number, since it is larger than the sum of its proper divisors (443305231).

43043042310221 is an equidigital number, since it uses as much as digits as its factorization.

43043042310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443305230.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 43043042310221 its reverse (12201324034034), we get a palindrome (55244366344255).

The spelling of 43043042310221 in words is "forty-three trillion, forty-three billion, forty-two million, three hundred ten thousand, two hundred twenty-one".