551506000 has 80 divisors (see below), whose sum is σ = 1339320528. Its totient is φ = 219648000.

The previous prime is 551505973. The next prime is 551506001. The reversal of 551506000 is 605155.

It can be written as a sum of positive squares in 8 ways, for example, as 453178944 + 98327056 = 21288^2 + 9916^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551506001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625560 + ... + 626440.

Almost surely, 2^551506000 is an apocalyptic number.

551506000 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 551506000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669660264).

551506000 is an abundant number, since it is smaller than the sum of its proper divisors (787814528).

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

551506000 is a wasteful number, since it uses less digits than its factorization.

551506000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 551506000 is about 23484.1648776362. The cubic root of 551506000 is about 820.0684059530.

The spelling of 551506000 in words is "five hundred fifty-one million, five hundred six thousand".