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13031412 = 2236311721
BaseRepresentation
bin110001101101…
…011111110100
3220112001201220
4301231133310
511314001122
61143150340
7215523312
oct61553764
926461656
1013031412
1173a0769
1244453b0
1329135c4
141a330b2
15122625c
hexc6d7f4

13031412 has 24 divisors (see below), whose sum is σ = 30472512. Its totient is φ = 4334400.

The previous prime is 13031407. The next prime is 13031413. The reversal of 13031412 is 21413031.

It is a junction number, because it is equal to n+sod(n) for n = 13031391 and 13031400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6712 + ... + 8432.

It is an arithmetic number, because the mean of its divisors is an integer number (1269688).

Almost surely, 213031412 is an apocalyptic number.

13031412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13031412 is an abundant number, since it is smaller than the sum of its proper divisors (17441100).

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

13031412 is a wasteful number, since it uses less digits than its factorization.

13031412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359 (or 2357 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13031412 is about 3609.9047078836. The cubic root of 13031412 is about 235.3227013755.

Adding to 13031412 its reverse (21413031), we get a palindrome (34444443).

The spelling of 13031412 in words is "thirteen million, thirty-one thousand, four hundred twelve".

Divisors: 1 2 3 4 6 12 631 1262 1721 1893 2524 3442 3786 5163 6884 7572 10326 20652 1085951 2171902 3257853 4343804 6515706 13031412