43424361421 has 4 divisors (see below), whose sum is σ = 49627841632. Its totient is φ = 37220881212.

The previous prime is 43424361403. The next prime is 43424361439. The reversal of 43424361421 is 12416342434.

43424361421 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, and also an emirpimes, since its reverse is a distinct semiprime: 12416342434 = 2 ⋅6208171217.

It is an interprime number because it is at equal distance from previous prime (43424361403) and next prime (43424361439).

It is a cyclic number.

It is not a de Polignac number, because 43424361421 - 2⁵ = 43424361389 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 (43424361481) 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, 3101740095 + ... + 3101740108.

It is an arithmetic number, because the mean of its divisors is an integer number (12406960408).

Almost surely, 2^43424361421 is an apocalyptic number.

It is an amenable number.

43424361421 is a deficient number, since it is larger than the sum of its proper divisors (6203480211).

43424361421 is an equidigital number, since it uses as much as digits as its factorization.

43424361421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6203480210.

The product of its digits is 55296, while the sum is 34.

The spelling of 43424361421 in words is "forty-three billion, four hundred twenty-four million, three hundred sixty-one thousand, four hundred twenty-one".