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12830181 = 371346997
BaseRepresentation
bin110000111100…
…010111100101
3220010211200220
4300330113211
511241031211
61134554553
7214024530
oct60742745
926124626
1012830181
117273561
124368a59
132872b30
1419bda17
1511d6806
hexc3c5e5

12830181 has 16 divisors (see below), whose sum is σ = 21055104. Its totient is φ = 6767424.

The previous prime is 12830173. The next prime is 12830203. The reversal of 12830181 is 18103821.

It is not a de Polignac number, because 12830181 - 23 = 12830173 is a prime.

It is a super-2 number, since 2×128301812 = 329227088985522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12830101) 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 15 ways as a sum of consecutive naturals, for example, 23226 + ... + 23771.

It is an arithmetic number, because the mean of its divisors is an integer number (1315944).

Almost surely, 212830181 is an apocalyptic number.

It is an amenable number.

12830181 is a deficient number, since it is larger than the sum of its proper divisors (8224923).

12830181 is a wasteful number, since it uses less digits than its factorization.

12830181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47020.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 12830181 is about 3581.9242035532. The cubic root of 12830181 is about 234.1051284507.

The spelling of 12830181 in words is "twelve million, eight hundred thirty thousand, one hundred eighty-one".

Divisors: 1 3 7 13 21 39 91 273 46997 140991 328979 610961 986937 1832883 4276727 12830181