550488321 has 12 divisors (see below), whose sum is σ = 797406948. Its totient is φ = 365950464.

The previous prime is 550488283. The next prime is 550488343. The reversal of 550488321 is 123884055.

It is a happy number.

550488321 is a `hidden beast` number, since 550 + 4 + 8 + 83 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 392634225 + 157854096 = 19815^2 + 12564^2 .

It is not a de Polignac number, because 550488321 - 2⁹ = 550487809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550488391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83460 + ... + 89813.

It is an arithmetic number, because the mean of its divisors is an integer number (66450579).

Almost surely, 2^550488321 is an apocalyptic number.

It is an amenable number.

550488321 is a deficient number, since it is larger than the sum of its proper divisors (246918627).

550488321 is a wasteful number, since it uses less digits than its factorization.

550488321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173632 (or 173629 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 550488321 is about 23462.4875279669. The cubic root of 550488321 is about 819.5636787416.

The spelling of 550488321 in words is "five hundred fifty million, four hundred eighty-eight thousand, three hundred twenty-one".