4043343220391 has 2 divisors, whose sum is σ = 4043343220392. Its totient is φ = 4043343220390.

The previous prime is 4043343220387. The next prime is 4043343220417. The reversal of 4043343220391 is 1930223433404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4043343220391 - 2² = 4043343220387 is a prime.

It is a super-3 number, since 3×4043343220391³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4043343220591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021671610195 + 2021671610196.

It is an arithmetic number, because the mean of its divisors is an integer number (2021671610196).

Almost surely, 2^{4043343220391} is an apocalyptic number.

4043343220391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4043343220391 is an equidigital number, since it uses as much as digits as its factorization.

4043343220391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 38.

Adding to 4043343220391 its reverse (1930223433404), we get a palindrome (5973566653795).

The spelling of 4043343220391 in words is "four trillion, forty-three billion, three hundred forty-three million, two hundred twenty thousand, three hundred ninety-one".