57428251 has 4 divisors (see below), whose sum is σ = 57632904. Its totient is φ = 57223600.

The previous prime is 57428237. The next prime is 57428303. The reversal of 57428251 is 15282475.

It is a happy number.

57428251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57428251 - 2⁷ = 57428123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57428201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101905 + ... + 102466.

It is an arithmetic number, because the mean of its divisors is an integer number (14408226).

Almost surely, 2^57428251 is an apocalyptic number.

57428251 is a deficient number, since it is larger than the sum of its proper divisors (204653).

57428251 is a wasteful number, since it uses less digits than its factorization.

57428251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204652.

The product of its digits is 22400, while the sum is 34.

The square root of 57428251 is about 7578.1429783292. The cubic root of 57428251 is about 385.8115248535.

The spelling of 57428251 in words is "fifty-seven million, four hundred twenty-eight thousand, two hundred fifty-one".