549220171 has 2 divisors, whose sum is σ = 549220172. Its totient is φ = 549220170.

The previous prime is 549220163. The next prime is 549220201. The reversal of 549220171 is 171022945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549220171 - 2³ = 549220163 is a prime.

It is not a weakly prime, because it can be changed into another prime (549220121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274610085 + 274610086.

It is an arithmetic number, because the mean of its divisors is an integer number (274610086).

Almost surely, 2^549220171 is an apocalyptic number.

549220171 is a deficient number, since it is larger than the sum of its proper divisors (1).

549220171 is an equidigital number, since it uses as much as digits as its factorization.

549220171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 549220171 is about 23435.4468914079. The cubic root of 549220171 is about 818.9338568438.

The spelling of 549220171 in words is "five hundred forty-nine million, two hundred twenty thousand, one hundred seventy-one".