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55287 = 326143
BaseRepresentation
bin1101011111110111
32210211200
431133313
53232122
61103543
7320121
oct153767
983750
1055287
11385a1
1227bb3
131c21b
1416211
15115ac
hexd7f7

55287 has 6 divisors (see below), whose sum is σ = 79872. Its totient is φ = 36852.

The previous prime is 55259. The next prime is 55291. The reversal of 55287 is 78255.

It is a happy number.

It is not a de Polignac number, because 55287 - 211 = 53239 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 55287.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55287.

It is not an unprimeable number, because it can be changed into a prime (55207) 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 5 ways as a sum of consecutive naturals, for example, 3063 + ... + 3080.

It is an arithmetic number, because the mean of its divisors is an integer number (13312).

255287 is an apocalyptic number.

55287 is a deficient number, since it is larger than the sum of its proper divisors (24585).

55287 is a wasteful number, since it uses less digits than its factorization.

55287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149 (or 6146 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 55287 is about 235.1318778898. The cubic root of 55287 is about 38.0955582066.

The spelling of 55287 in words is "fifty-five thousand, two hundred eighty-seven".

Divisors: 1 3 9 6143 18429 55287