551549 has 2 divisors, whose sum is σ = 551550. Its totient is φ = 551548.

The previous prime is 551543. The next prime is 551557. The reversal of 551549 is 945155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319225 + 232324 = 565^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 551549 - 2¹² = 547453 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551549.

It is not a weakly prime, because it can be changed into another prime (551543) 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, 275774 + 275775.

It is an arithmetic number, because the mean of its divisors is an integer number (275775).

2⁵⁵¹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

551549 is a deficient number, since it is larger than the sum of its proper divisors (1).

551549 is an equidigital number, since it uses as much as digits as its factorization.

551549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 29.

The square root of 551549 is about 742.6634500230. The cubic root of 551549 is about 82.0089718520.

The spelling of 551549 in words is "five hundred fifty-one thousand, five hundred forty-nine".