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65501 = 173853
BaseRepresentation
bin1111111111011101
310022211222
433333131
54044001
61223125
7361652
oct177735
9108758
1065501
1145237
1231aa5
1323a77
1419c29
151461b
hexffdd

65501 has 4 divisors (see below), whose sum is σ = 69372. Its totient is φ = 61632.

The previous prime is 65497. The next prime is 65519. The reversal of 65501 is 10556.

65501 = T23 + T24 + ... + T73.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60025 + 5476 = 245^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 65501 - 22 = 65497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 3853 = 65501 / (6 + 5 + 5 + 0 + 1).

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 65501.

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 65501.

It is not an unprimeable number, because it can be changed into a prime (65521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910 + ... + 1943.

It is an arithmetic number, because the mean of its divisors is an integer number (17343).

265501 is an apocalyptic number.

It is an amenable number.

65501 is a deficient number, since it is larger than the sum of its proper divisors (3871).

65501 is a wasteful number, since it uses less digits than its factorization.

65501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 65501 is about 255.9316314956. The cubic root of 65501 is about 40.3102950339.

Subtracting from 65501 its reverse (10556), we obtain a palindrome (54945).

The spelling of 65501 in words is "sixty-five thousand, five hundred one".

Divisors: 1 17 3853 65501