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BaseRepresentation
bin1001001110010001101
3120100120101
41021302031
534132341
610251101
72366053
oct1116215
9510511
10302221
11197077
12126a91
13a773a
147c1d3
155e831
hex49c8d

302221 has 2 divisors, whose sum is σ = 302222. Its totient is φ = 302220.

The previous prime is 302213. The next prime is 302227. The reversal of 302221 is 122203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264196 + 38025 = 514^2 + 195^2 .

It is an emirp because it is prime and its reverse (122203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 302221 - 23 = 302213 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 302198 and 302207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (302227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151110 + 151111.

It is an arithmetic number, because the mean of its divisors is an integer number (151111).

2302221 is an apocalyptic number.

It is an amenable number.

302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

302221 is an equidigital number, since it uses as much as digits as its factorization.

302221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 302221 is about 549.7463051263. The cubic root of 302221 is about 67.1080901728.

Adding to 302221 its reverse (122203), we get a palindrome (424424).

The spelling of 302221 in words is "three hundred two thousand, two hundred twenty-one", and thus it is an iban number.