551505500 has 384 divisors, whose sum is σ = 1690730496. Its totient is φ = 152064000.

The previous prime is 551505497. The next prime is 551505527. The reversal of 551505500 is 5505155.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 551505500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17790485 + ... + 17790515.

It is an arithmetic number, because the mean of its divisors is an integer number (4402944).

Almost surely, 2^551505500 is an apocalyptic number.

551505500 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 551505500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845365248).

551505500 is an abundant number, since it is smaller than the sum of its proper divisors (1139224996).

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

551505500 is a wasteful number, since it uses less digits than its factorization.

551505500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 551505500 is about 23484.1542321626. The cubic root of 551505500 is about 820.0681581260.

The spelling of 551505500 in words is "five hundred fifty-one million, five hundred five thousand, five hundred".