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12131055375 = 35332349481
BaseRepresentation
bin10110100110001000…
…10011011100001111
31011022102201110112020
423103010103130033
5144321022233000
65323430341223
7606422161245
oct132304233417
934272643466
1012131055375
1151657344aa
1224267ba813
1311b435c79a
148311b4795
154b000bba0
hex2d311370f

12131055375 has 16 divisors (see below), whose sum is σ = 20186076768. Its totient is φ = 6469896000.

The previous prime is 12131055353. The next prime is 12131055407. The reversal of 12131055375 is 57355013121.

12131055375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12131055375 - 221 = 12128958223 is a prime.

It is a super-2 number, since 2×121310553752 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16174366 + ... + 16175115.

It is an arithmetic number, because the mean of its divisors is an integer number (1261629798).

Almost surely, 212131055375 is an apocalyptic number.

12131055375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12131055375 is a deficient number, since it is larger than the sum of its proper divisors (8055021393).

12131055375 is an equidigital number, since it uses as much as digits as its factorization.

12131055375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32349499 (or 32349489 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 33.

Adding to 12131055375 its reverse (57355013121), we get a palindrome (69486068496).

The spelling of 12131055375 in words is "twelve billion, one hundred thirty-one million, fifty-five thousand, three hundred seventy-five".

Divisors: 1 3 5 15 25 75 125 375 32349481 97048443 161747405 485242215 808737025 2426211075 4043685125 12131055375