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810223 is a prime number
BaseRepresentation
bin11000101110011101111
31112011102021
43011303233
5201411343
625211011
76613111
oct3056357
91464367
10810223
11503807
12330a67
13224a2b
141713b1
151100ed
hexc5cef

810223 has 2 divisors, whose sum is σ = 810224. Its totient is φ = 810222.

The previous prime is 810209. The next prime is 810239. The reversal of 810223 is 322018.

It is a happy number.

It is an a-pointer prime, because the next prime (810239) can be obtained adding 810223 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 810223 - 25 = 810191 is a prime.

It is a super-2 number, since 2×8102232 = 1312922619458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 810197 and 810206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (810253) 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 as a sum of consecutive naturals, namely, 405111 + 405112.

It is an arithmetic number, because the mean of its divisors is an integer number (405112).

2810223 is an apocalyptic number.

810223 is a deficient number, since it is larger than the sum of its proper divisors (1).

810223 is an equidigital number, since it uses as much as digits as its factorization.

810223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 810223 is about 900.1238803631. The cubic root of 810223 is about 93.2255288733.

The spelling of 810223 in words is "eight hundred ten thousand, two hundred twenty-three".