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68812315 = 51113157613
BaseRepresentation
bin1000001100111…
…11111000011011
311210111000202021
410012133320123
5120103443230
610454515311
71463615665
oct406377033
9153430667
1068812315
113592a790
121b065b37
1311344060
1491d3535
156093c7a
hex419fe1b

68812315 has 32 divisors (see below), whose sum is σ = 97788096. Its totient is φ = 45826560.

The previous prime is 68812301. The next prime is 68812333. The reversal of 68812315 is 51321886.

It is not a de Polignac number, because 68812315 - 27 = 68812187 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111949 + ... + 112561.

It is an arithmetic number, because the mean of its divisors is an integer number (3055878).

Almost surely, 268812315 is an apocalyptic number.

68812315 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68812315 is a deficient number, since it is larger than the sum of its proper divisors (28975781).

68812315 is a wasteful number, since it uses less digits than its factorization.

68812315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its digits is 11520, while the sum is 34.

The square root of 68812315 is about 8295.3188606587. The cubic root of 68812315 is about 409.7843700567.

The spelling of 68812315 in words is "sixty-eight million, eight hundred twelve thousand, three hundred fifteen".

Divisors: 1 5 11 13 55 65 143 157 613 715 785 1727 2041 3065 6743 7969 8635 10205 22451 33715 39845 87659 96241 112255 438295 481205 1058651 1251133 5293255 6255665 13762463 68812315