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21335 = 517251
BaseRepresentation
bin101001101010111
31002021012
411031113
51140320
6242435
7116126
oct51527
932235
1021335
1115036
121041b
139932
147abd
1564c5
hex5357

21335 has 8 divisors (see below), whose sum is σ = 27216. Its totient is φ = 16000.

The previous prime is 21323. The next prime is 21341. The reversal of 21335 is 53312.

Subtracting from 21335 its sum of digits (14), we obtain a triangular number (21321 = T206).

Adding to 21335 its reverse (53312), we get a palindrome (74647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21335 - 24 = 21319 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41 + ... + 210.

It is an arithmetic number, because the mean of its divisors is an integer number (3402).

221335 is an apocalyptic number.

21335 is a deficient number, since it is larger than the sum of its proper divisors (5881).

21335 is a wasteful number, since it uses less digits than its factorization.

21335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

The product of its digits is 90, while the sum is 14.

The square root of 21335 is about 146.0650539999. The cubic root of 21335 is about 27.7351732065.

The spelling of 21335 in words is "twenty-one thousand, three hundred thirty-five".

Divisors: 1 5 17 85 251 1255 4267 21335