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57256085 = 5172329287
BaseRepresentation
bin1101101001101…
…0100010010101
310222201220120202
43122122202111
5104124143320
65403110245
71263445235
oct332324225
9128656522
1057256085
112a357387
1217212385
13bb29053
147865cc5
15505eb75
hex369a895

57256085 has 16 divisors (see below), whose sum is σ = 75914496. Its totient is φ = 41234688.

The previous prime is 57256027. The next prime is 57256097. The reversal of 57256085 is 58065275.

57256085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 57256085 - 28 = 57255829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12689 + ... + 16598.

It is an arithmetic number, because the mean of its divisors is an integer number (4744656).

Almost surely, 257256085 is an apocalyptic number.

It is an amenable number.

57256085 is a deficient number, since it is larger than the sum of its proper divisors (18658411).

57256085 is a wasteful number, since it uses less digits than its factorization.

57256085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29332.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 57256085 is about 7566.7750726449. The cubic root of 57256085 is about 385.4255933392.

The spelling of 57256085 in words is "fifty-seven million, two hundred fifty-six thousand, eighty-five".

Divisors: 1 5 17 23 85 115 391 1955 29287 146435 497879 673601 2489395 3368005 11451217 57256085