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13211143 = 112412663
BaseRepresentation
bin110010011001…
…011000000111
3220212012021121
4302121120013
511340224033
61151054411
7220202311
oct62313007
926765247
1013211143
117503800
124511407
13297735a
141a7c7b1
15125e62d
hexc99607

13211143 has 12 divisors (see below), whose sum is σ = 14881104. Its totient is φ = 11712800.

The previous prime is 13211129. The next prime is 13211161. The reversal of 13211143 is 34111231.

It is not a de Polignac number, because 13211143 - 25 = 13211111 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 (13211113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3630 + ... + 6292.

It is an arithmetic number, because the mean of its divisors is an integer number (1240092).

Almost surely, 213211143 is an apocalyptic number.

13211143 is a deficient number, since it is larger than the sum of its proper divisors (1669961).

13211143 is a wasteful number, since it uses less digits than its factorization.

13211143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726 (or 2715 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 13211143 is about 3634.7136063244. The cubic root of 13211143 is about 236.3996329120.

Adding to 13211143 its reverse (34111231), we get a palindrome (47322374).

The spelling of 13211143 in words is "thirteen million, two hundred eleven thousand, one hundred forty-three".

Divisors: 1 11 41 121 451 2663 4961 29293 109183 322223 1201013 13211143