57813857 has 4 divisors (see below), whose sum is σ = 57831876. Its totient is φ = 57795840.

The previous prime is 57813817. The next prime is 57813871. The reversal of 57813857 is 75831875.

57813857 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 can be written as a sum of positive squares in 2 ways, for example, as 37957921 + 19855936 = 6161^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 57813857 - 2⁸ = 57813601 is a prime.

It is a super-2 number, since 2×57813857² = 6684884122432898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57813817) 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, 2744 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (14457969).

Almost surely, 2^57813857 is an apocalyptic number.

It is an amenable number.

57813857 is a deficient number, since it is larger than the sum of its proper divisors (18019).

57813857 is a wasteful number, since it uses less digits than its factorization.

57813857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18018.

The product of its digits is 235200, while the sum is 44.

The square root of 57813857 is about 7603.5423981194. The cubic root of 57813857 is about 386.6731187819.

The spelling of 57813857 in words is "fifty-seven million, eight hundred thirteen thousand, eight hundred fifty-seven".