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68215 = 571949
BaseRepresentation
bin10000101001110111
310110120111
4100221313
54140330
61243451
7402610
oct205167
9113514
1068215
1147284
1233587
1325084
141ac07
151532a
hex10a77

68215 has 8 divisors (see below), whose sum is σ = 93600. Its totient is φ = 46752.

The previous prime is 68213. The next prime is 68219. The reversal of 68215 is 51286.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68215 - 21 = 68213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68213) 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, 940 + ... + 1009.

It is an arithmetic number, because the mean of its divisors is an integer number (11700).

268215 is an apocalyptic number.

68215 is a deficient number, since it is larger than the sum of its proper divisors (25385).

68215 is a wasteful number, since it uses less digits than its factorization.

68215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961.

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

The square root of 68215 is about 261.1800145494. The cubic root of 68215 is about 40.8595232051.

The spelling of 68215 in words is "sixty-eight thousand, two hundred fifteen".

Divisors: 1 5 7 35 1949 9745 13643 68215