551540000 has 240 divisors, whose sum is σ = 1558751040. Its totient is φ = 190080000.

The previous prime is 551539997. The next prime is 551540021. The reversal of 551540000 is 45155.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5059946 + ... + 5060054.

It is an arithmetic number, because the mean of its divisors is an integer number (6494796).

Almost surely, 2^551540000 is an apocalyptic number.

551540000 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 551540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779375520).

551540000 is an abundant number, since it is smaller than the sum of its proper divisors (1007211040).

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

551540000 is a wasteful number, since it uses less digits than its factorization.

551540000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 551540000 is about 23484.8887585187. Note that the first 3 decimals coincide. The cubic root of 551540000 is about 820.0852578415.

Adding to 551540000 its reverse (45155), we get a palindrome (551585155).

The spelling of 551540000 in words is "five hundred fifty-one million, five hundred forty thousand".