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51007 = 114637
BaseRepresentation
bin1100011100111111
32120222011
430130333
53113012
61032051
7301465
oct143477
976864
1051007
1135360
1225627
131a2a8
1414835
15101a7
hexc73f

51007 has 4 divisors (see below), whose sum is σ = 55656. Its totient is φ = 46360.

The previous prime is 51001. The next prime is 51031. The reversal of 51007 is 70015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-51007 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2308 + ... + 2329.

It is an arithmetic number, because the mean of its divisors is an integer number (13914).

251007 is an apocalyptic number.

51007 is a deficient number, since it is larger than the sum of its proper divisors (4649).

51007 is a wasteful number, since it uses less digits than its factorization.

51007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648.

The product of its (nonzero) digits is 35, while the sum is 13.

The square root of 51007 is about 225.8472935415. The cubic root of 51007 is about 37.0859942823.

The spelling of 51007 in words is "fifty-one thousand, seven".

Divisors: 1 11 4637 51007