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13230031 = 17477573
BaseRepresentation
bin110010011101…
…111111001111
3220220011012011
4302131333033
511341330111
61151322051
7220311343
oct62357717
926804164
1013230031
117516a11
124520327
132982b29
141a85623
151265021
hexc9dfcf

13230031 has 4 divisors (see below), whose sum is σ = 13239352. Its totient is φ = 13220712.

The previous prime is 13230013. The next prime is 13230043. The reversal of 13230031 is 13003231.

13230031 is digitally balanced in base 3, 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13230031 - 25 = 13229999 is a prime.

It is a super-2 number, since 2×132300312 = 350067440521922, 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 = 13229993 and 13230020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13230001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040 + ... + 5533.

It is an arithmetic number, because the mean of its divisors is an integer number (3309838).

Almost surely, 213230031 is an apocalyptic number.

13230031 is a deficient number, since it is larger than the sum of its proper divisors (9321).

13230031 is an equidigital number, since it uses as much as digits as its factorization.

13230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9320.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 13230031 is about 3637.3109572870. The cubic root of 13230031 is about 236.5122396215.

Adding to 13230031 its reverse (13003231), we get a palindrome (26233262).

The spelling of 13230031 in words is "thirteen million, two hundred thirty thousand, thirty-one".

Divisors: 1 1747 7573 13230031