6551081 has 2 divisors, whose sum is σ = 6551082. Its totient is φ = 6551080.

The previous prime is 6551063. The next prime is 6551087. The reversal of 6551081 is 1801556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5837056 + 714025 = 2416^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551081 - 2¹⁰ = 6550057 is a prime.

It is a super-2 number, since 2×6551081² = 85833324537122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6551081.

It is not a weakly prime, because it can be changed into another prime (6551087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275540 + 3275541.

It is an arithmetic number, because the mean of its divisors is an integer number (3275541).

Almost surely, 2^6551081 is an apocalyptic number.

It is an amenable number.

6551081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551081 is an equidigital number, since it uses as much as digits as its factorization.

6551081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 6551081 is about 2559.5079605268. The cubic root of 6551081 is about 187.1131556083.

The spelling of 6551081 in words is "six million, five hundred fifty-one thousand, eighty-one".