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13012330031 = 15782881083
BaseRepresentation
bin11000001111001100…
…00110011000101111
31020120211222212002022
430013212012120233
5203122124030111
65551111220355
7640312660151
oct140746063057
936524885068
1013012330031
115578137168
1226319776bb
1312c4acac8c
148b6258ad1
1551258a2db
hex30798662f

13012330031 has 4 divisors (see below), whose sum is σ = 13095211272. Its totient is φ = 12929448792.

The previous prime is 13012330013. The next prime is 13012330057. The reversal of 13012330031 is 13003321031.

13012330031 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: 13003321031 = 43732973547.

It is a cyclic number.

It is not a de Polignac number, because 13012330031 - 222 = 13008135727 is a prime.

It is a super-3 number, since 3×130123300313 (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13012329991 and 13012330009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012930031) 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, 41440385 + ... + 41440698.

It is an arithmetic number, because the mean of its divisors is an integer number (3273802818).

Almost surely, 213012330031 is an apocalyptic number.

13012330031 is a deficient number, since it is larger than the sum of its proper divisors (82881241).

13012330031 is an equidigital number, since it uses as much as digits as its factorization.

13012330031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82881240.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 13012330031 its reverse (13003321031), we get a palindrome (26015651062).

It can be divided in two parts, 1301 and 2330031, that added together give a palindrome (2331332).

The spelling of 13012330031 in words is "thirteen billion, twelve million, three hundred thirty thousand, thirty-one".

Divisors: 1 157 82881083 13012330031