Search a number
-
+
51265 = 510253
BaseRepresentation
bin1100100001000001
32121022201
430201001
53120030
61033201
7302314
oct144101
977281
1051265
1135575
1225801
131a446
141497b
15102ca
hexc841

51265 has 4 divisors (see below), whose sum is σ = 61524. Its totient is φ = 41008.

The previous prime is 51263. The next prime is 51283. The reversal of 51265 is 56215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56215 = 511243.

It can be written as a sum of positive squares in 2 ways, for example, as 11664 + 39601 = 108^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 51265 - 21 = 51263 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (51263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5122 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (15381).

251265 is an apocalyptic number.

It is an amenable number.

51265 is a deficient number, since it is larger than the sum of its proper divisors (10259).

51265 is a wasteful number, since it uses less digits than its factorization.

51265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258.

The product of its digits is 300, while the sum is 19.

The square root of 51265 is about 226.4177554875. The cubic root of 51265 is about 37.1484177361.

Subtracting 51265 from its reverse (56215), we obtain a triangular number (4950 = T99).

The spelling of 51265 in words is "fifty-one thousand, two hundred sixty-five".

Divisors: 1 5 10253 51265