43345403422021 has 4 divisors (see below), whose sum is σ = 43792263251212. Its totient is φ = 42898543592832.

The previous prime is 43345403421989. The next prime is 43345403422073. The reversal of 43345403422021 is 12022430454334.

It is a happy number.

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 30179311344900 + 13166092077121 = 5493570^2 + 3628511^2 .

It is a cyclic number.

It is not a de Polignac number, because 43345403422021 - 2⁵ = 43345403421989 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 (43345403422081) 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, 223429914450 + ... + 223429914643.

It is an arithmetic number, because the mean of its divisors is an integer number (10948065812803).

Almost surely, 2^{43345403422021} is an apocalyptic number.

It is an amenable number.

43345403422021 is a deficient number, since it is larger than the sum of its proper divisors (446859829191).

43345403422021 is an equidigital number, since it uses as much as digits as its factorization.

43345403422021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446859829190.

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 43345403422021 its reverse (12022430454334), we get a palindrome (55367833876355).

The spelling of 43345403422021 in words is "forty-three trillion, three hundred forty-five billion, four hundred three million, four hundred twenty-two thousand, twenty-one".