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68200105 = 528148541
BaseRepresentation
bin1000001000010…
…10011010101001
311202022220221211
410010022122221
5114424400410
610433433121
71455456061
oct404123251
9152286854
1068200105
1135551826
121aa0b7a1
131118b4bc
1490b43a1
155ec268a
hex410a6a9

68200105 has 8 divisors (see below), whose sum is σ = 82133064. Its totient is φ = 54364800.

The previous prime is 68200103. The next prime is 68200109. The reversal of 68200105 is 50100286.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 434281 + 67765824 = 659^2 + 8232^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68200105 - 21 = 68200103 is a prime.

It is a super-2 number, since 2×682001052 = 9302508644022050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68200103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22866 + ... + 25675.

It is an arithmetic number, because the mean of its divisors is an integer number (10266633).

Almost surely, 268200105 is an apocalyptic number.

It is an amenable number.

68200105 is a deficient number, since it is larger than the sum of its proper divisors (13932959).

68200105 is a wasteful number, since it uses less digits than its factorization.

68200105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48827.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 68200105 is about 8258.3354860408. The cubic root of 68200105 is about 408.5654904546.

The spelling of 68200105 in words is "sixty-eight million, two hundred thousand, one hundred five".

Divisors: 1 5 281 1405 48541 242705 13640021 68200105