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51681060 = 22325287117
BaseRepresentation
bin1100010100100…
…1011100100100
310121020200002100
43011021130210
5101212243220
65043412100
71165165434
oct305113444
9117220070
1051681060
1127199822
1215384030
13a926612
146c142c4
15480cd90
hex3149724

51681060 has 36 divisors (see below), whose sum is σ = 156766428. Its totient is φ = 13781568.

The previous prime is 51681043. The next prime is 51681079. The reversal of 51681060 is 6018615.

It can be written as a sum of positive squares in 2 ways, for example, as 9144576 + 42536484 = 3024^2 + 6522^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143379 + ... + 143738.

It is an arithmetic number, because the mean of its divisors is an integer number (4354623).

Almost surely, 251681060 is an apocalyptic number.

It is an amenable number.

51681060 is an abundant number, since it is smaller than the sum of its proper divisors (105085368).

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

51681060 is a wasteful number, since it uses less digits than its factorization.

51681060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287132 (or 287127 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 51681060 is about 7188.9540268387. The cubic root of 51681060 is about 372.4864430602.

Adding to 51681060 its reverse (6018615), we get a palindrome (57699675).

The spelling of 51681060 in words is "fifty-one million, six hundred eighty-one thousand, sixty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 180 287117 574234 861351 1148468 1435585 1722702 2584053 2871170 3445404 4306755 5168106 5742340 8613510 10336212 12920265 17227020 25840530 51681060