550542581 has 2 divisors, whose sum is σ = 550542582. Its totient is φ = 550542580.

The previous prime is 550542557. The next prime is 550542589. The reversal of 550542581 is 185245055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283383556 + 267159025 = 16834^2 + 16345^2 .

It is a cyclic number.

It is not a de Polignac number, because 550542581 - 2¹⁰ = 550541557 is a prime.

It is a super-2 number, since 2×550542581² = 606194266988283122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550542589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275271290 + 275271291.

It is an arithmetic number, because the mean of its divisors is an integer number (275271291).

Almost surely, 2^550542581 is an apocalyptic number.

It is an amenable number.

550542581 is a deficient number, since it is larger than the sum of its proper divisors (1).

550542581 is an equidigital number, since it uses as much as digits as its factorization.

550542581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40000, while the sum is 35.

The square root of 550542581 is about 23463.6438133552. The cubic root of 550542581 is about 819.5906051767.

The spelling of 550542581 in words is "five hundred fifty million, five hundred forty-two thousand, five hundred eighty-one".