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14443221 = 3131991861
BaseRepresentation
bin110111000110…
…001011010101
31000011210101010
4313012023111
512144140341
61233322433
7233523342
oct67061325
930153333
1014443221
118175451
124a06419
132cb90b0
141cbd7c9
151404716
hexdc62d5

14443221 has 16 divisors (see below), whose sum is σ = 20854400. Its totient is φ = 8838720.

The previous prime is 14443213. The next prime is 14443237. The reversal of 14443221 is 12234441.

It is not a de Polignac number, because 14443221 - 23 = 14443213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14443201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6831 + ... + 8691.

It is an arithmetic number, because the mean of its divisors is an integer number (1303400).

Almost surely, 214443221 is an apocalyptic number.

It is an amenable number.

14443221 is a deficient number, since it is larger than the sum of its proper divisors (6411179).

14443221 is a wasteful number, since it uses less digits than its factorization.

14443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076.

The product of its digits is 768, while the sum is 21.

The square root of 14443221 is about 3800.4237921579. The cubic root of 14443221 is about 243.5312430484.

Adding to 14443221 its reverse (12234441), we get a palindrome (26677662).

It can be divided in two parts, 144432 and 21, that added together give a triangular number (144453 = T537).

The spelling of 14443221 in words is "fourteen million, four hundred forty-three thousand, two hundred twenty-one".

Divisors: 1 3 13 39 199 597 1861 2587 5583 7761 24193 72579 370339 1111017 4814407 14443221