5591281 has 2 divisors, whose sum is σ = 5591282. Its totient is φ = 5591280.

The previous prime is 5591273. The next prime is 5591297. The reversal of 5591281 is 1821955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4910656 + 680625 = 2216^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 5591281 - 2³ = 5591273 is a prime.

It is a super-2 number, since 2×5591281² = 62524846441922, which contains 22 as substring.

5591281 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5591221) 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, 2795640 + 2795641.

It is an arithmetic number, because the mean of its divisors is an integer number (2795641).

Almost surely, 2^5591281 is an apocalyptic number.

It is an amenable number.

5591281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5591281 is an equidigital number, since it uses as much as digits as its factorization.

5591281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 31.

The square root of 5591281 is about 2364.5889706247. The cubic root of 5591281 is about 177.4885901546.

The spelling of 5591281 in words is "five million, five hundred ninety-one thousand, two hundred eighty-one".