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13143143 = 1323113389
BaseRepresentation
bin110010001000…
…110001100111
3220201202000002
4302020301213
511331040033
61145411515
7216500126
oct62106147
926652002
1013143143
117467702
124499b9b
132952410
141a61abd
1512493e8
hexc88c67

13143143 has 16 divisors (see below), whose sum is σ = 14938560. Its totient is φ = 11472384.

The previous prime is 13143089. The next prime is 13143149. The reversal of 13143143 is 34134131.

It is a cyclic number.

It is not a de Polignac number, because 13143143 - 210 = 13142119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143149) 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 15 ways as a sum of consecutive naturals, for example, 33593 + ... + 33981.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 213143143 is an apocalyptic number.

13143143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13143143 is a deficient number, since it is larger than the sum of its proper divisors (1795417).

13143143 is a wasteful number, since it uses less digits than its factorization.

13143143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its digits is 432, while the sum is 20.

The square root of 13143143 is about 3625.3472937086. The cubic root of 13143143 is about 235.9933386514.

Adding to 13143143 its reverse (34134131), we get a palindrome (47277274).

The spelling of 13143143 in words is "thirteen million, one hundred forty-three thousand, one hundred forty-three".

Divisors: 1 13 23 113 299 389 1469 2599 5057 8947 33787 43957 116311 571441 1011011 13143143