505220000 has 60 divisors (see below), whose sum is σ = 1242966186. Its totient is φ = 202080000.

The previous prime is 505219997. The next prime is 505220003. The reversal of 505220000 is 22505.

It is an interprime number because it is at equal distance from previous prime (505219997) and next prime (505220003).

It can be written as a sum of positive squares in 5 ways, for example, as 5071504 + 500148496 = 2252^2 + 22364^2 .

It is not an unprimeable number, because it can be changed into a prime (505220003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7370 + ... + 32630.

Almost surely, 2^505220000 is an apocalyptic number.

505220000 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 505220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621483093).

505220000 is an abundant number, since it is smaller than the sum of its proper divisors (737746186).

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

505220000 is an equidigital number, since it uses as much as digits as its factorization.

505220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25291 (or 25268 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 505220000 is about 22477.0994570029. The cubic root of 505220000 is about 796.4530471484.

Adding to 505220000 its reverse (22505), we get a palindrome (505242505).

It can be divided in two parts, 5052 and 20000, that added together give a palindrome (25052).

The spelling of 505220000 in words is "five hundred five million, two hundred twenty thousand".