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163021 is a prime number
BaseRepresentation
bin100111110011001101
322021121211
4213303031
520204041
63254421
71246165
oct476315
9267554
10163021
11101531
127a411
1359281
14435a5
1533481
hex27ccd

163021 has 2 divisors, whose sum is σ = 163022. Its totient is φ = 163020.

The previous prime is 163019. The next prime is 163027. The reversal of 163021 is 120361.

163021 = 2852 + 2862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81796 + 81225 = 286^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 163021 - 21 = 163019 is a prime.

Together with 163019, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 162992 and 163010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163027) 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, 81510 + 81511.

It is an arithmetic number, because the mean of its divisors is an integer number (81511).

2163021 is an apocalyptic number.

163021 is the 286-th centered square number.

It is an amenable number.

163021 is a deficient number, since it is larger than the sum of its proper divisors (1).

163021 is an equidigital number, since it uses as much as digits as its factorization.

163021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 163021 is about 403.7585912399. The cubic root of 163021 is about 54.6279014948.

Adding to 163021 its reverse (120361), we get a palindrome (283382).

The spelling of 163021 in words is "one hundred sixty-three thousand, twenty-one".