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228521099 is a prime number
BaseRepresentation
bin11011001111011…
…11010010001011
3120221000002000102
431213233102023
5432000133344
634402000015
75443253162
oct1547572213
9527002012
10228521099
11107aa3314
126464600b
13384620b1
14224c83d9
15150dee4e
hexd9ef48b

228521099 has 2 divisors, whose sum is σ = 228521100. Its totient is φ = 228521098.

The previous prime is 228521023. The next prime is 228521129. The reversal of 228521099 is 990125822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-228521099 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228521299) 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 as a sum of consecutive naturals, namely, 114260549 + 114260550.

It is an arithmetic number, because the mean of its divisors is an integer number (114260550).

Almost surely, 2228521099 is an apocalyptic number.

228521099 is a deficient number, since it is larger than the sum of its proper divisors (1).

228521099 is an equidigital number, since it uses as much as digits as its factorization.

228521099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 228521099 is about 15116.9143346121. The cubic root of 228521099 is about 611.3765374954.

The spelling of 228521099 in words is "two hundred twenty-eight million, five hundred twenty-one thousand, ninety-nine".