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13112321 = 172926597
BaseRepresentation
bin110010000001…
…010000000001
3220200011201112
4302001100001
511324043241
61145013105
7216311225
oct62012001
926604645
1013112321
117446532
124484195
132941391
141a54785
1512401eb
hexc81401

13112321 has 8 divisors (see below), whose sum is σ = 14362920. Its totient is φ = 11915008.

The previous prime is 13112273. The next prime is 13112329. The reversal of 13112321 is 12321131.

13112321 = 25602 + 25612.

13112321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6553600 + 6558721 = 2560^2 + 2561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13112321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13112296 and 13112305.

It is not an unprimeable number, because it can be changed into a prime (13112329) 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, 12806 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (1795365).

Almost surely, 213112321 is an apocalyptic number.

13112321 is the 2561-st centered square number.

It is an amenable number.

13112321 is a deficient number, since it is larger than the sum of its proper divisors (1250599).

13112321 is a wasteful number, since it uses less digits than its factorization.

13112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26643.

The product of its digits is 36, while the sum is 14.

The square root of 13112321 is about 3621.0938954962. The cubic root of 13112321 is about 235.8087181735.

Adding to 13112321 its reverse (12321131), we get a palindrome (25433452).

The spelling of 13112321 in words is "thirteen million, one hundred twelve thousand, three hundred twenty-one".

Divisors: 1 17 29 493 26597 452149 771313 13112321