551005000 has 240 divisors, whose sum is σ = 1626651180. Its totient is φ = 173376000.

The previous prime is 551004983. The next prime is 551005031. The reversal of 551005000 is 500155.

It can be written as a sum of positive squares in 10 ways, for example, as 30891364 + 520113636 = 5558^2 + 22806^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3184914 + ... + 3185086.

Almost surely, 2^551005000 is an apocalyptic number.

551005000 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 551005000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813325590).

551005000 is an abundant number, since it is smaller than the sum of its proper divisors (1075646180).

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

551005000 is a wasteful number, since it uses less digits than its factorization.

551005000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 551005000 is about 23473.4956919501. The cubic root of 551005000 is about 819.8200080850.

Adding to 551005000 its reverse (500155), we get a palindrome (551505155).

The spelling of 551005000 in words is "five hundred fifty-one million, five thousand".