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8164223 = 21138693
BaseRepresentation
bin11111001001001101111111
3120100210012122
4133021031333
54042223343
6450553155
7126252254
oct37111577
916323178
108164223
1146769a1
1228987bb
1318cb102
14112742b
15ab4068
hex7c937f

8164223 has 4 divisors (see below), whose sum is σ = 8203128. Its totient is φ = 8125320.

The previous prime is 8164217. The next prime is 8164249. The reversal of 8164223 is 3224618.

8164223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3224618 = 21612309.

It is a cyclic number.

It is not a de Polignac number, because 8164223 - 26 = 8164159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8164192 and 8164201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8164213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19136 + ... + 19557.

It is an arithmetic number, because the mean of its divisors is an integer number (2050782).

Almost surely, 28164223 is an apocalyptic number.

8164223 is a deficient number, since it is larger than the sum of its proper divisors (38905).

8164223 is a wasteful number, since it uses less digits than its factorization.

8164223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38904.

The product of its digits is 2304, while the sum is 26.

The square root of 8164223 is about 2857.3104486562. The cubic root of 8164223 is about 201.3592660508.

The spelling of 8164223 in words is "eight million, one hundred sixty-four thousand, two hundred twenty-three".

Divisors: 1 211 38693 8164223