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13230517 = 19696343
BaseRepresentation
bin110010011110…
…000110110101
3220220011212011
4302132012311
511341334032
61151324221
7220312636
oct62360665
926804764
1013230517
117517313
124520671
132983111
141a8588d
151265247
hexc9e1b5

13230517 has 4 divisors (see below), whose sum is σ = 13926880. Its totient is φ = 12534156.

The previous prime is 13230493. The next prime is 13230523. The reversal of 13230517 is 71503231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71503231 = 178740013.

It is a cyclic number.

It is not a de Polignac number, because 13230517 - 27 = 13230389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13230527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348153 + ... + 348190.

It is an arithmetic number, because the mean of its divisors is an integer number (3481720).

Almost surely, 213230517 is an apocalyptic number.

It is an amenable number.

13230517 is a deficient number, since it is larger than the sum of its proper divisors (696363).

13230517 is an equidigital number, since it uses as much as digits as its factorization.

13230517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696362.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 13230517 is about 3637.3777642692. The cubic root of 13230517 is about 236.5151356475.

Adding to 13230517 its reverse (71503231), we get a palindrome (84733748).

The spelling of 13230517 in words is "thirteen million, two hundred thirty thousand, five hundred seventeen".

Divisors: 1 19 696343 13230517