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8228223 = 3611287
BaseRepresentation
bin11111011000110101111111
3120111001000000
4133120311333
54101300343
6452205343
7126636663
oct37306577
916431000
108228223
11470aa93
122909853
131921293
1411428a3
15ac7ed3
hex7d8d7f

8228223 has 14 divisors (see below), whose sum is σ = 12337784. Its totient is φ = 5484996.

The previous prime is 8228201. The next prime is 8228263. The reversal of 8228223 is 3228228.

It is not a de Polignac number, because 8228223 - 25 = 8228191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

8228223 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8228263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4915 + ... + 6372.

Almost surely, 28228223 is an apocalyptic number.

8228223 is a deficient number, since it is larger than the sum of its proper divisors (4109561).

8228223 is an equidigital number, since it uses as much as digits as its factorization.

8228223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11305 (or 11290 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 8228223 is about 2868.4879292059. The cubic root of 8228223 is about 201.8840542990.

It can be divided in two parts, 822 and 8223, that added together give a triangular number (9045 = T134).

The spelling of 8228223 in words is "eight million, two hundred twenty-eight thousand, two hundred twenty-three".

Divisors: 1 3 9 27 81 243 729 11287 33861 101583 304749 914247 2742741 8228223