551819840 has 224 divisors, whose sum is σ = 1597639680. Its totient is φ = 178790400.

The previous prime is 551819833. The next prime is 551819843. The reversal of 551819840 is 48918155.

It is not an unprimeable number, because it can be changed into a prime (551819843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1418366 + ... + 1418754.

It is an arithmetic number, because the mean of its divisors is an integer number (7132320).

Almost surely, 2^551819840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551819840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798819840).

551819840 is an abundant number, since it is smaller than the sum of its proper divisors (1045819840).

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

551819840 is a wasteful number, since it uses less digits than its factorization.

551819840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 551819840 is about 23490.8458766388. The cubic root of 551819840 is about 820.2239324956.

The spelling of 551819840 in words is "five hundred fifty-one million, eight hundred nineteen thousand, eight hundred forty".