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131068660 = 22513947147
BaseRepresentation
bin1111100111111…
…11001011110100
3100010121222101211
413303333023310
5232023144120
621001131204
73151031242
oct763771364
9303558354
10131068660
1167a91908
1237a89b04
1321201028
141359b792
15b79025a
hex7cff2f4

131068660 has 24 divisors (see below), whose sum is σ = 277230240. Its totient is φ = 52049184.

The previous prime is 131068607. The next prime is 131068681. The reversal of 131068660 is 66860131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20794 + ... + 26353.

It is an arithmetic number, because the mean of its divisors is an integer number (11551260).

Almost surely, 2131068660 is an apocalyptic number.

131068660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131068660 is an abundant number, since it is smaller than the sum of its proper divisors (146161580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131068660 is a wasteful number, since it uses less digits than its factorization.

131068660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47295 (or 47293 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 131068660 is about 11448.5221753727. The cubic root of 131068660 is about 507.9640218800.

The spelling of 131068660 in words is "one hundred thirty-one million, sixty-eight thousand, six hundred sixty".

Divisors: 1 2 4 5 10 20 139 278 556 695 1390 2780 47147 94294 188588 235735 471470 942940 6553433 13106866 26213732 32767165 65534330 131068660