57238681 has 4 divisors (see below), whose sum is σ = 57745332. Its totient is φ = 56732032.

The previous prime is 57238669. The next prime is 57238693. The reversal of 57238681 is 18683275.

57238681 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 an interprime number because it is at equal distance from previous prime (57238669) and next prime (57238693).

It can be written as a sum of positive squares in 2 ways, for example, as 4182025 + 53056656 = 2045^2 + 7284^2 .

It is a cyclic number.

It is not a de Polignac number, because 57238681 - 2⁷ = 57238553 is a prime.

It is a super-2 number, since 2×57238681² = 6552533205239522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57238631) 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, 253156 + ... + 253381.

It is an arithmetic number, because the mean of its divisors is an integer number (14436333).

Almost surely, 2^57238681 is an apocalyptic number.

It is an amenable number.

57238681 is a deficient number, since it is larger than the sum of its proper divisors (506651).

57238681 is a wasteful number, since it uses less digits than its factorization.

57238681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506650.

The product of its digits is 80640, while the sum is 40.

The square root of 57238681 is about 7565.6249576621. The cubic root of 57238681 is about 385.3865370724.

The spelling of 57238681 in words is "fifty-seven million, two hundred thirty-eight thousand, six hundred eighty-one".