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19028281 is a prime number
BaseRepresentation
bin100100010010…
…1100100111001
31022210201220011
41020211210321
514332401111
61515501521
7320511016
oct110454471
938721804
1019028281
11a817258
1264578a1
133c3304c
14275470d
151a0d021
hex1225939

19028281 has 2 divisors, whose sum is σ = 19028282. Its totient is φ = 19028280.

The previous prime is 19028257. The next prime is 19028293. The reversal of 19028281 is 18282091.

19028281 = 30842 + 30852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9517225 + 9511056 = 3085^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 19028281 - 215 = 18995513 is a prime.

It is a super-2 number, since 2×190282812 = 724150955629922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19028221) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9514140 + 9514141.

It is an arithmetic number, because the mean of its divisors is an integer number (9514141).

Almost surely, 219028281 is an apocalyptic number.

19028281 is the 3085-th centered square number.

It is an amenable number.

19028281 is a deficient number, since it is larger than the sum of its proper divisors (1).

19028281 is an equidigital number, since it uses as much as digits as its factorization.

19028281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 19028281 is about 4362.1417904511. The cubic root of 19028281 is about 266.9724940921.

The spelling of 19028281 in words is "nineteen million, twenty-eight thousand, two hundred eighty-one".