56054421021 has 8 divisors (see below), whose sum is σ = 74741812704. Its totient is φ = 37368321680.

The previous prime is 56054420921. The next prime is 56054421023. The reversal of 56054421021 is 12012445065.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56054421021 - 2¹⁰ = 56054419997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56054421021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56054421023) 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 7 ways as a sum of consecutive naturals, for example, 216891 + ... + 398936.

It is an arithmetic number, because the mean of its divisors is an integer number (9342726588).

Almost surely, 2^56054421021 is an apocalyptic number.

It is an amenable number.

56054421021 is a deficient number, since it is larger than the sum of its proper divisors (18687391683).

56054421021 is a wasteful number, since it uses less digits than its factorization.

56054421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646171.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 56054421021 its reverse (12012445065), we get a palindrome (68066866086).

The spelling of 56054421021 in words is "fifty-six billion, fifty-four million, four hundred twenty-one thousand, twenty-one".