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51192680 = 23571121511
BaseRepresentation
bin1100001101001…
…0001101101000
310120022212011012
43003102031220
5101101131210
65025123052
71161062540
oct303221550
9116285135
1051192680
1126995900
1215189488
13a7b5236
146b28320
154763305
hex30d2368

51192680 has 96 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 15945600.

The previous prime is 51192679. The next prime is 51192697. The reversal of 51192680 is 8629115.

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 23 ways as a sum of consecutive naturals, for example, 33125 + ... + 34635.

It is an arithmetic number, because the mean of its divisors is an integer number (1508220).

Almost surely, 251192680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51192680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72394560).

51192680 is an abundant number, since it is smaller than the sum of its proper divisors (93596440).

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

51192680 is a wasteful number, since it uses less digits than its factorization.

51192680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551 (or 1536 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 51192680 is about 7154.9060091660. The cubic root of 51192680 is about 371.3094097882.

The spelling of 51192680 in words is "fifty-one million, one hundred ninety-two thousand, six hundred eighty".

Divisors: 1 2 4 5 7 8 10 11 14 20 22 28 35 40 44 55 56 70 77 88 110 121 140 154 220 242 280 308 385 440 484 605 616 770 847 968 1210 1511 1540 1694 2420 3022 3080 3388 4235 4840 6044 6776 7555 8470 10577 12088 15110 16621 16940 21154 30220 33242 33880 42308 52885 60440 66484 83105 84616 105770 116347 132968 166210 182831 211540 232694 332420 365662 423080 465388 581735 664840 731324 914155 930776 1163470 1279817 1462648 1828310 2326940 2559634 3656620 4653880 5119268 6399085 7313240 10238536 12798170 25596340 51192680