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8209223 = 115314081
BaseRepresentation
bin11111010100001101000111
3120110001221022
4133110031013
54100143343
6451541355
7126530411
oct37241507
916401838
108209223
1146a7790
1228ba85b
131915739
1411399b1
15ac2568
hex7d4347

8209223 has 8 divisors (see below), whose sum is σ = 9125136. Its totient is φ = 7321600.

The previous prime is 8209217. The next prime is 8209231. The reversal of 8209223 is 3229028.

8209223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8209223 - 210 = 8208199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8209192 and 8209201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8209213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6458 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (1140642).

Almost surely, 28209223 is an apocalyptic number.

8209223 is the 1532-nd centered heptagonal number.

8209223 is a deficient number, since it is larger than the sum of its proper divisors (915913).

8209223 is a wasteful number, since it uses less digits than its factorization.

8209223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14145.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 8209223 is about 2865.1741657358. The cubic root of 8209223 is about 201.7285426626.

The spelling of 8209223 in words is "eight million, two hundred nine thousand, two hundred twenty-three".

Divisors: 1 11 53 583 14081 154891 746293 8209223