43424405205421 has 32 divisors (see below), whose sum is σ = 46900855996416. Its totient is φ = 40087658160000.

The previous prime is 43424405205407. The next prime is 43424405205469. The reversal of 43424405205421 is 12450250442434.

It is a cyclic number.

It is not a de Polignac number, because 43424405205421 - 2⁹ = 43424405204909 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 (43424405505421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 831843121 + ... + 831895321.

It is an arithmetic number, because the mean of its divisors is an integer number (1465651749888).

Almost surely, 2^{43424405205421} is an apocalyptic number.

It is an amenable number.

43424405205421 is a deficient number, since it is larger than the sum of its proper divisors (3476450790995).

43424405205421 is a wasteful number, since it uses less digits than its factorization.

43424405205421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55393.

The product of its (nonzero) digits is 614400, while the sum is 40.

Adding to 43424405205421 its reverse (12450250442434), we get a palindrome (55874655647855).

The spelling of 43424405205421 in words is "forty-three trillion, four hundred twenty-four billion, four hundred five million, two hundred five thousand, four hundred twenty-one".