549218851 has 2 divisors, whose sum is σ = 549218852. Its totient is φ = 549218850.

The previous prime is 549218843. The next prime is 549218927. The reversal of 549218851 is 158812945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549218851 - 2³ = 549218843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 549218798 and 549218807.

It is not a weakly prime, because it can be changed into another prime (549218651) 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, 274609425 + 274609426.

It is an arithmetic number, because the mean of its divisors is an integer number (274609426).

Almost surely, 2^549218851 is an apocalyptic number.

549218851 is a deficient number, since it is larger than the sum of its proper divisors (1).

549218851 is an equidigital number, since it uses as much as digits as its factorization.

549218851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 43.

The square root of 549218851 is about 23435.4187289240. The cubic root of 549218851 is about 818.9332007659.

The spelling of 549218851 in words is "five hundred forty-nine million, two hundred eighteen thousand, eight hundred fifty-one".