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13244131 = 19169341
BaseRepresentation
bin110010100001…
…011011100011
3220220212112101
4302201123203
511342303011
61151511231
7220400425
oct62413343
926825471
1013244131
11752656a
124528517
132989384
141a8a815
1512692c1
hexca16e3

13244131 has 4 divisors (see below), whose sum is σ = 13313664. Its totient is φ = 13174600.

The previous prime is 13244123. The next prime is 13244141. The reversal of 13244131 is 13144231.

13244131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13144231 = 41320591.

It is a cyclic number.

It is not a de Polignac number, because 13244131 - 23 = 13244123 is a prime.

It is a super-2 number, since 2×132441312 = 350814011890322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13244099 and 13244108.

It is not an unprimeable number, because it can be changed into a prime (13244141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34480 + ... + 34861.

It is an arithmetic number, because the mean of its divisors is an integer number (3328416).

Almost surely, 213244131 is an apocalyptic number.

13244131 is a deficient number, since it is larger than the sum of its proper divisors (69533).

13244131 is an equidigital number, since it uses as much as digits as its factorization.

13244131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69532.

The product of its digits is 288, while the sum is 19.

The square root of 13244131 is about 3639.2486861988. The cubic root of 13244131 is about 236.5962313263.

Adding to 13244131 its reverse (13144231), we get a palindrome (26388362).

The spelling of 13244131 in words is "thirteen million, two hundred forty-four thousand, one hundred thirty-one".

Divisors: 1 191 69341 13244131