550161220 has 36 divisors (see below), whose sum is σ = 1343967660. Its totient is φ = 188626368.

The previous prime is 550161217. The next prime is 550161229. The reversal of 550161220 is 22161055.

It can be written as a sum of positive squares in 2 ways, for example, as 115605504 + 434555716 = 10752^2 + 20846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 550161191 and 550161200.

It is not an unprimeable number, because it can be changed into a prime (550161229) 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, 279715 + ... + 281674.

It is an arithmetic number, because the mean of its divisors is an integer number (37332435).

Almost surely, 2^550161220 is an apocalyptic number.

It is an amenable number.

550161220 is an abundant number, since it is smaller than the sum of its proper divisors (793806440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550161220 is a wasteful number, since it uses less digits than its factorization.

550161220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561412 (or 561403 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 550161220 is about 23455.5157692173. The cubic root of 550161220 is about 819.4013179163.

The spelling of 550161220 in words is "five hundred fifty million, one hundred sixty-one thousand, two hundred twenty".