8055581 has 2 divisors, whose sum is σ = 8055582. Its totient is φ = 8055580.

The previous prime is 8055571. The next prime is 8055587. The reversal of 8055581 is 1855508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8031556 + 24025 = 2834^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 8055581 - 2⁶ = 8055517 is a prime.

It is a super-2 number, since 2×8055581² = 129784770495122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8055587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4027790 + 4027791.

It is an arithmetic number, because the mean of its divisors is an integer number (4027791).

Almost surely, 2^8055581 is an apocalyptic number.

It is an amenable number.

8055581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8055581 is an equidigital number, since it uses as much as digits as its factorization.

8055581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8000, while the sum is 32.

The square root of 8055581 is about 2838.2355434319. The cubic root of 8055581 is about 200.4621064657.

The spelling of 8055581 in words is "eight million, fifty-five thousand, five hundred eighty-one".