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57082681 = 1071513533
BaseRepresentation
bin1101100111000…
…0001100111001
310222102002201101
43121300030321
5104103121211
65355251401
71262123545
oct331601471
9128362641
1057082681
112a249077
1217149b61
13ba98146
14781ca25
1550285c1
hex3670339

57082681 has 8 divisors (see below), whose sum is σ = 58014144. Its totient is φ = 56158800.

The previous prime is 57082679. The next prime is 57082691. The reversal of 57082681 is 18628075.

57082681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57082681 - 21 = 57082679 is a prime.

It is a super-2 number, since 2×570826812 = 6516864940295522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57082681.

It is not an unprimeable number, because it can be changed into a prime (57082691) 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 7 ways as a sum of consecutive naturals, for example, 14391 + ... + 17923.

It is an arithmetic number, because the mean of its divisors is an integer number (7251768).

Almost surely, 257082681 is an apocalyptic number.

It is an amenable number.

57082681 is a deficient number, since it is larger than the sum of its proper divisors (931463).

57082681 is a wasteful number, since it uses less digits than its factorization.

57082681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 57082681 is about 7555.3081340207. The cubic root of 57082681 is about 385.0361038836.

The spelling of 57082681 in words is "fifty-seven million, eighty-two thousand, six hundred eighty-one".

Divisors: 1 107 151 3533 16157 378031 533483 57082681