550173321 has 12 divisors (see below), whose sum is σ = 795748980. Its totient is φ = 366295680.

The previous prime is 550173307. The next prime is 550173341. The reversal of 550173321 is 123371055.

It can be written as a sum of positive squares in 2 ways, for example, as 174240000 + 375933321 = 13200^2 + 19389^2 .

It is not a de Polignac number, because 550173321 - 2¹⁰ = 550172297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550173341) 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, 33316 + ... + 47013.

It is an arithmetic number, because the mean of its divisors is an integer number (66312415).

Almost surely, 2^550173321 is an apocalyptic number.

It is an amenable number.

550173321 is a deficient number, since it is larger than the sum of its proper divisors (245575659).

550173321 is a wasteful number, since it uses less digits than its factorization.

550173321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81096 (or 81093 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 550173321 is about 23455.7737241814. The cubic root of 550173321 is about 819.4073255509.

The spelling of 550173321 in words is "five hundred fifty million, one hundred seventy-three thousand, three hundred twenty-one".