551000000 has 196 divisors, whose sum is σ = 1488262200. Its totient is φ = 201600000.

The previous prime is 550999993. The next prime is 551000053. The reversal of 551000000 is 155.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 18999986 + ... + 19000014.

Almost surely, 2^551000000 is an apocalyptic number.

551000000 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 551000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (744131100).

551000000 is an abundant number, since it is smaller than the sum of its proper divisors (937262200).

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

551000000 is an frugal number, since it uses more digits than its factorization.

551000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 11.

The square root of 551000000 is about 23473.3891886110. The cubic root of 551000000 is about 819.8175283056.

Adding to 551000000 its reverse (155), we get a palindrome (551000155).

The spelling of 551000000 in words is "five hundred fifty-one million", and thus it is an aban number.