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13103311 = 1317211281
BaseRepresentation
bin110001111111…
…000011001111
3220122201100211
4301333003033
511323301221
61144503251
7216243034
oct61770317
926581324
1013103311
11743a791
12447ab27
13293a250
141a5138b
15123c6e1
hexc7f0cf

13103311 has 16 divisors (see below), whose sum is σ = 15065568. Its totient is φ = 11289600.

The previous prime is 13103303. The next prime is 13103323. The reversal of 13103311 is 11330131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13103311 - 23 = 13103303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 13103291 and 13103300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13103341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46491 + ... + 46771.

It is an arithmetic number, because the mean of its divisors is an integer number (941598).

Almost surely, 213103311 is an apocalyptic number.

13103311 is a deficient number, since it is larger than the sum of its proper divisors (1962257).

13103311 is a wasteful number, since it uses less digits than its factorization.

13103311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 13103311 is about 3619.8495825103. The cubic root of 13103311 is about 235.7546945983.

Adding to 13103311 its reverse (11330131), we get a palindrome (24433442).

It can be divided in two parts, 131033 and 11, that added together give a square (131044 = 3622).

The spelling of 13103311 in words is "thirteen million, one hundred three thousand, three hundred eleven".

Divisors: 1 13 17 211 221 281 2743 3587 3653 4777 46631 59291 62101 770783 1007947 13103311