549002081 has 8 divisors (see below), whose sum is σ = 552455400. Its totient is φ = 545558400.

The previous prime is 549002071. The next prime is 549002099. The reversal of 549002081 is 180200945.

It can be written as a sum of positive squares in 4 ways, for example, as 296700625 + 252301456 = 17225^2 + 15884^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549002081 is a prime.

It is a super-2 number, since 2×549002081² = 602806569884661122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549002071) 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 in 7 ways as a sum of consecutive naturals, for example, 135635 + ... + 139623.

It is an arithmetic number, because the mean of its divisors is an integer number (69056925).

Almost surely, 2^549002081 is an apocalyptic number.

It is an amenable number.

549002081 is a deficient number, since it is larger than the sum of its proper divisors (3453319).

549002081 is a wasteful number, since it uses less digits than its factorization.

549002081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 549002081 is about 23430.7934351357. The cubic root of 549002081 is about 818.8254455971.

The spelling of 549002081 in words is "five hundred forty-nine million, two thousand, eighty-one".