43042442432221 has 4 divisors (see below), whose sum is σ = 45307834139200. Its totient is φ = 40777050725244.

The previous prime is 43042442432159. The next prime is 43042442432237. The reversal of 43042442432221 is 12223424424034.

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 not a de Polignac number, because 43042442432221 - 2³⁷ = 42905003478749 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 (43042443432221) 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, 1132695853461 + ... + 1132695853498.

It is an arithmetic number, because the mean of its divisors is an integer number (11326958534800).

Almost surely, 2^{43042442432221} is an apocalyptic number.

It is an amenable number.

43042442432221 is a deficient number, since it is larger than the sum of its proper divisors (2265391706979).

43042442432221 is a wasteful number, since it uses less digits than its factorization.

43042442432221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265391706978.

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 43042442432221 its reverse (12223424424034), we get a palindrome (55265866856255).

The spelling of 43042442432221 in words is "forty-three trillion, forty-two billion, four hundred forty-two million, four hundred thirty-two thousand, two hundred twenty-one".