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551321 is a prime number
BaseRepresentation
bin10000110100110011001
31001000021022
42012212121
5120120241
615452225
74454231
oct2064631
91030238
10551321
11347241
12227075
13163c34
14104cc1
15ad54b
hex86999

551321 has 2 divisors, whose sum is σ = 551322. Its totient is φ = 551320.

The previous prime is 551311. The next prime is 551339. The reversal of 551321 is 123155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 3721 = 740^2 + 61^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-551321 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551321.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551321.

It is not a weakly prime, because it can be changed into another prime (551311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275660 + 275661.

It is an arithmetic number, because the mean of its divisors is an integer number (275661).

2551321 is an apocalyptic number.

It is an amenable number.

551321 is a deficient number, since it is larger than the sum of its proper divisors (1).

551321 is an equidigital number, since it uses as much as digits as its factorization.

551321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150, while the sum is 17.

The square root of 551321 is about 742.5099325935. The cubic root of 551321 is about 81.9976699715.

Adding to 551321 its reverse (123155), we get a palindrome (674476).

The spelling of 551321 in words is "five hundred fifty-one thousand, three hundred twenty-one".