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68804151 = 31317157661
BaseRepresentation
bin1000001100111…
…01111000110111
311210110121112220
410012131320313
5120103213101
610454413423
71463553123
oct406357067
9153417486
1068804151
1135924639
121b061273
1311340420
1491d0583
156091636
hex419de37

68804151 has 32 divisors (see below), whose sum is σ = 105432768. Its totient is φ = 39536640.

The previous prime is 68804107. The next prime is 68804161. The reversal of 68804151 is 15140886.

It is not a de Polignac number, because 68804151 - 29 = 68803639 is a prime.

It is a super-2 number, since 2×688041512 = 9468022389661602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68804161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103761 + ... + 104421.

It is an arithmetic number, because the mean of its divisors is an integer number (3294774).

Almost surely, 268804151 is an apocalyptic number.

68804151 is a deficient number, since it is larger than the sum of its proper divisors (36628617).

68804151 is a wasteful number, since it uses less digits than its factorization.

68804151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 68804151 is about 8294.8267613013. The cubic root of 68804151 is about 409.7681635976.

The spelling of 68804151 in words is "sixty-eight million, eight hundred four thousand, one hundred fifty-one".

Divisors: 1 3 13 17 39 51 157 221 471 661 663 1983 2041 2669 6123 8007 8593 11237 25779 33711 34697 103777 104091 146081 311331 438243 1349101 1764209 4047303 5292627 22934717 68804151