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55685 = 573743
BaseRepresentation
bin1101100110000101
32211101102
431212011
53240220
61105445
7321230
oct154605
984342
1055685
1138923
1228285
131c466
1416417
1511775
hexd985

55685 has 16 divisors (see below), whose sum is σ = 80256. Its totient is φ = 36288.

The previous prime is 55681. The next prime is 55691. The reversal of 55685 is 58655.

It can be divided in two parts, 55 and 685, that multiplied together give a triangular number (37675 = T274).

55685 = T38 + T39 + ... + T72.

55685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55685 - 22 = 55681 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1274 + ... + 1316.

It is an arithmetic number, because the mean of its divisors is an integer number (5016).

255685 is an apocalyptic number.

It is an amenable number.

55685 is a deficient number, since it is larger than the sum of its proper divisors (24571).

55685 is a wasteful number, since it uses less digits than its factorization.

55685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92.

The product of its digits is 6000, while the sum is 29.

The square root of 55685 is about 235.9766937644. The cubic root of 55685 is about 38.1867538112.

The spelling of 55685 in words is "fifty-five thousand, six hundred eighty-five".

Divisors: 1 5 7 35 37 43 185 215 259 301 1295 1505 1591 7955 11137 55685