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21483 = 3271131
BaseRepresentation
bin101001111101011
31002110200
411033223
51141413
6243243
7116430
oct51753
932420
1021483
1115160
1210523
139a17
147b87
156573
hex53eb

21483 has 24 divisors (see below), whose sum is σ = 39936. Its totient is φ = 10800.

The previous prime is 21481. The next prime is 21487. The reversal of 21483 is 38412.

Adding to 21483 its reverse (38412), we get a palindrome (59895).

It can be divided in two parts, 2 and 1483, that added together give a triangular number (1485 = T54).

It is a happy number.

It is not a de Polignac number, because 21483 - 21 = 21481 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (21481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 678 + ... + 708.

It is an arithmetic number, because the mean of its divisors is an integer number (1664).

221483 is an apocalyptic number.

21483 is the 93-rd heptagonal number.

21483 is a deficient number, since it is larger than the sum of its proper divisors (18453).

21483 is a wasteful number, since it uses less digits than its factorization.

21483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 52 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21483 is about 146.5708020037. The cubic root of 21483 is about 27.7991580581.

The spelling of 21483 in words is "twenty-one thousand, four hundred eighty-three".

Divisors: 1 3 7 9 11 21 31 33 63 77 93 99 217 231 279 341 651 693 1023 1953 2387 3069 7161 21483