551040500 has 96 divisors (see below), whose sum is σ = 1261897728. Its totient is φ = 209952000.

The previous prime is 551040481. The next prime is 551040517. The reversal of 551040500 is 5040155.

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 31 ways as a sum of consecutive naturals, for example, 1131257 + ... + 1131743.

It is an arithmetic number, because the mean of its divisors is an integer number (13144768).

Almost surely, 2^551040500 is an apocalyptic number.

551040500 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 551040500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630948864).

551040500 is an abundant number, since it is smaller than the sum of its proper divisors (710857228).

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

551040500 is a wasteful number, since it uses less digits than its factorization.

551040500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 598 counting only the distinct ones).

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

The square root of 551040500 is about 23474.2518517630. The cubic root of 551040500 is about 819.8376140869.

Adding to 551040500 its reverse (5040155), we get a palindrome (556080655).

The spelling of 551040500 in words is "five hundred fifty-one million, forty thousand, five hundred".