551066500 has 144 divisors (see below), whose sum is σ = 1318052736. Its totient is φ = 201096000.

The previous prime is 551066479. The next prime is 551066501. The reversal of 551066500 is 5660155.

It is not an unprimeable number, because it can be changed into a prime (551066501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7761465 + ... + 7761535.

It is an arithmetic number, because the mean of its divisors is an integer number (9153144).

Almost surely, 2^551066500 is an apocalyptic number.

551066500 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 551066500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659026368).

551066500 is an abundant number, since it is smaller than the sum of its proper divisors (766986236).

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

551066500 is a wasteful number, since it uses less digits than its factorization.

551066500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 551066500 is about 23474.8056434979. The cubic root of 551066500 is about 819.8505081438.

It can be divided in two parts, 5510 and 66500, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 551066500 in words is "five hundred fifty-one million, sixty-six thousand, five hundred".