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51568 = 2411293
BaseRepresentation
bin1100100101110000
32121201221
430211300
53122233
61034424
7303226
oct144560
977657
1051568
1135820
1225a14
131a61a
1414b16
151042d
hexc970

51568 has 20 divisors (see below), whose sum is σ = 109368. Its totient is φ = 23360.

The previous prime is 51563. The next prime is 51577. The reversal of 51568 is 86515.

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 (51563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30 + ... + 322.

251568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54684).

51568 is an abundant number, since it is smaller than the sum of its proper divisors (57800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51568 is a wasteful number, since it uses less digits than its factorization.

51568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 306 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 51568 is about 227.0858868358. The cubic root of 51568 is about 37.2214621595.

The spelling of 51568 in words is "fifty-one thousand, five hundred sixty-eight".

Divisors: 1 2 4 8 11 16 22 44 88 176 293 586 1172 2344 3223 4688 6446 12892 25784 51568