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2821229 is a prime number
BaseRepresentation
bin1010110000110001101101
312022022222222
422300301231
51210234404
6140245125
732660105
oct12606155
95268888
102821229
1116576a4
12b407a5
1377a188
14536205
153aadbe
hex2b0c6d

2821229 has 2 divisors, whose sum is σ = 2821230. Its totient is φ = 2821228.

The previous prime is 2821183. The next prime is 2821267. The reversal of 2821229 is 9221282.

2821229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1965604 + 855625 = 1402^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2821229 - 216 = 2755693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2821198 and 2821207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2821289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410614 + 1410615.

It is an arithmetic number, because the mean of its divisors is an integer number (1410615).

22821229 is an apocalyptic number.

It is an amenable number.

2821229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821229 is an equidigital number, since it uses as much as digits as its factorization.

2821229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 2821229 is about 1679.6514519388. The cubic root of 2821229 is about 141.3012855771.

The spelling of 2821229 in words is "two million, eight hundred twenty-one thousand, two hundred twenty-nine".