5855581 has 2 divisors, whose sum is σ = 5855582. Its totient is φ = 5855580.

The previous prime is 5855557. The next prime is 5855587. The reversal of 5855581 is 1855585.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 2775556 = 1755^2 + 1666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5855581 is a prime.

It is a super-2 number, since 2×5855581² = 68575657695122, which contains 22 as substring.

5855581 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5855581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5855587) 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, 2927790 + 2927791.

It is an arithmetic number, because the mean of its divisors is an integer number (2927791).

Almost surely, 2^5855581 is an apocalyptic number.

It is an amenable number.

5855581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5855581 is an equidigital number, since it uses as much as digits as its factorization.

5855581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40000, while the sum is 37.

The square root of 5855581 is about 2419.8307792075. The cubic root of 5855581 is about 180.2422766345.

The spelling of 5855581 in words is "five million, eight hundred fifty-five thousand, five hundred eighty-one".