5251055420421 has 12 divisors (see below), whose sum is σ = 7655744352672. Its totient is φ = 3467986756776.

The previous prime is 5251055420419. The next prime is 5251055420437. The reversal of 5251055420421 is 1240245501525.

5251055420421 is a `hidden beast` number, since 5 + 2 + 5 + 105 + 542 + 0 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 5251055420421 - 2¹ = 5251055420419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251055420521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2726403721 + ... + 2726405646.

It is an arithmetic number, because the mean of its divisors is an integer number (637978696056).

Almost surely, 2^{5251055420421} is an apocalyptic number.

It is an amenable number.

5251055420421 is a deficient number, since it is larger than the sum of its proper divisors (2404688932251).

5251055420421 is a wasteful number, since it uses less digits than its factorization.

5251055420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5452809480 (or 5452809477 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 5251055420421 in words is "five trillion, two hundred fifty-one billion, fifty-five million, four hundred twenty thousand, four hundred twenty-one".