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13311312 = 2437173229
BaseRepresentation
bin110010110001…
…110101010000
3221001021200120
4302301311100
511401430222
61153150240
7221100330
oct62616520
927037616
1013311312
117571a93
12455b380
1329b0b21
141aa70c0
15127e15c
hexcb1d50

13311312 has 80 divisors (see below), whose sum is σ = 39699840. Its totient is φ = 3764736.

The previous prime is 13311301. The next prime is 13311313. The reversal of 13311312 is 21311331.

It is a super-2 number, since 2×133113122 = 354382054322688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 13311291 and 13311300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13311313) 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, 58014 + ... + 58242.

It is an arithmetic number, because the mean of its divisors is an integer number (496248).

Almost surely, 213311312 is an apocalyptic number.

13311312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13311312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19849920).

13311312 is an abundant number, since it is smaller than the sum of its proper divisors (26388528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13311312 is a wasteful number, since it uses less digits than its factorization.

13311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 414 counting only the distinct ones).

The product of its digits is 54, while the sum is 15.

The square root of 13311312 is about 3648.4670753619. The cubic root of 13311312 is about 236.9956024750.

Adding to 13311312 its reverse (21311331), we get a palindrome (34622643).

The spelling of 13311312 in words is "thirteen million, three hundred eleven thousand, three hundred twelve".

Divisors: 1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 56 84 112 168 173 229 336 346 458 519 687 692 916 1038 1211 1374 1384 1603 1832 2076 2422 2748 2768 3206 3633 3664 4152 4809 4844 5496 6412 7266 8304 9618 9688 10992 12824 14532 19236 19376 25648 29064 38472 39617 58128 76944 79234 118851 158468 237702 277319 316936 475404 554638 633872 831957 950808 1109276 1663914 1901616 2218552 3327828 4437104 6655656 13311312