57428557221 has 16 divisors (see below), whose sum is σ = 88089724928. Its totient is φ = 32598990000.

The previous prime is 57428557159. The next prime is 57428557229. The reversal of 57428557221 is 12275582475.

It is not a de Polignac number, because 57428557221 - 2¹⁸ = 57428295077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57428557229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9052105 + ... + 9058446.

It is an arithmetic number, because the mean of its divisors is an integer number (5505607808).

Almost surely, 2^57428557221 is an apocalyptic number.

It is an amenable number.

57428557221 is a deficient number, since it is larger than the sum of its proper divisors (30661167707).

57428557221 is a wasteful number, since it uses less digits than its factorization.

57428557221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18110712.

The product of its digits is 1568000, while the sum is 48.

The spelling of 57428557221 in words is "fifty-seven billion, four hundred twenty-eight million, five hundred fifty-seven thousand, two hundred twenty-one".