550001000 has 64 divisors (see below), whose sum is σ = 1362750480. Its totient is φ = 207052800.

The previous prime is 550000993. The next prime is 550001027. The reversal of 550001000 is 100055.

It can be written as a sum of positive squares in 8 ways, for example, as 146071396 + 403929604 = 12086^2 + 20098^2 .

It is a super-2 number, since 2×550001000² = 605002200002000000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 824 + ... + 33176.

Almost surely, 2^550001000 is an apocalyptic number.

550001000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681375240).

550001000 is an abundant number, since it is smaller than the sum of its proper divisors (812749480).

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

550001000 is a wasteful number, since it uses less digits than its factorization.

550001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32391 (or 32377 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 11.

The square root of 550001000 is about 23452.1001191791. The cubic root of 550001000 is about 819.3217671587.

Adding to 550001000 its reverse (100055), we get a palindrome (550101055).

The spelling of 550001000 in words is "five hundred fifty million, one thousand".