550181000 has 32 divisors (see below), whose sum is σ = 1287425880. Its totient is φ = 220072000.

The previous prime is 550180997. The next prime is 550181003. The reversal of 550181000 is 181055.

It is an interprime number because it is at equal distance from previous prime (550180997) and next prime (550181003).

It can be written as a sum of positive squares in 4 ways, for example, as 91278916 + 458902084 = 9554^2 + 21422^2 .

It is a super-2 number, since 2×550181000² = 605398265522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (550181003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274091 + ... + 276090.

Almost surely, 2^550181000 is an apocalyptic number.

550181000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

550181000 is an abundant number, since it is smaller than the sum of its proper divisors (737244880).

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

550181000 is a wasteful number, since it uses less digits than its factorization.

550181000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550202 (or 550188 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 550181000 is about 23455.9374146505. The cubic root of 550181000 is about 819.4111378038.

Subtracting from 550181000 its reverse (181055), we obtain a palindrome (549999945).

The spelling of 550181000 in words is "five hundred fifty million, one hundred eighty-one thousand".