55421443520843 has 2 divisors, whose sum is σ = 55421443520844. Its totient is φ = 55421443520842.

The previous prime is 55421443520809. The next prime is 55421443520867. The reversal of 55421443520843 is 34802534412455.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55421443520843 - 2⁴⁰ = 54321931893067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55421443520791 and 55421443520800.

It is not a weakly prime, because it can be changed into another prime (55421943520843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27710721760421 + 27710721760422.

It is an arithmetic number, because the mean of its divisors is an integer number (27710721760422).

Almost surely, 2^{55421443520843} is an apocalyptic number.

55421443520843 is a deficient number, since it is larger than the sum of its proper divisors (1).

55421443520843 is an equidigital number, since it uses as much as digits as its factorization.

55421443520843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216000, while the sum is 50.

The spelling of 55421443520843 in words is "fifty-five trillion, four hundred twenty-one billion, four hundred forty-three million, five hundred twenty thousand, eight hundred forty-three".