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13027231 = 71861033
BaseRepresentation
bin110001101100…
…011110011111
3220111212000001
4301230132133
511313332411
61143115131
7215505160
oct61543637
926455001
1013027231
117398608
124442aa7
132911729
141a31767
151224dc1
hexc6c79f

13027231 has 4 divisors (see below), whose sum is σ = 14888272. Its totient is φ = 11166192.

The previous prime is 13027229. The next prime is 13027243. The reversal of 13027231 is 13272031.

13027231 = 14712 + 14722 + ... + 14762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13272031 = 19368767.

It is a cyclic number.

It is not a de Polignac number, because 13027231 - 21 = 13027229 is a prime.

It is a super-2 number, since 2×130272312 = 339417495054722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13027199 and 13027208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13027031) 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, 930510 + ... + 930523.

It is an arithmetic number, because the mean of its divisors is an integer number (3722068).

Almost surely, 213027231 is an apocalyptic number.

13027231 is a deficient number, since it is larger than the sum of its proper divisors (1861041).

13027231 is an equidigital number, since it uses as much as digits as its factorization.

13027231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861040.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 13027231 is about 3609.3255602675. The cubic root of 13027231 is about 235.2975316943.

Adding to 13027231 its reverse (13272031), we get a palindrome (26299262).

The spelling of 13027231 in words is "thirteen million, twenty-seven thousand, two hundred thirty-one".

Divisors: 1 7 1861033 13027231