551544320 has 40 divisors (see below), whose sum is σ = 1322419824. Its totient is φ = 220616704.

The previous prime is 551544313. The next prime is 551544353. The reversal of 551544320 is 23445155.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×551544320² = 608402273848524800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105164 + ... + 110283.

Almost surely, 2^551544320 is an apocalyptic number.

It is an amenable number.

551544320 is an abundant number, since it is smaller than the sum of its proper divisors (770875504).

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

551544320 is an equidigital number, since it uses as much as digits as its factorization.

551544320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215470 (or 215454 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 551544320 is about 23484.9807323745. The cubic root of 551544320 is about 820.0873989730.

Adding to 551544320 its reverse (23445155), we get a palindrome (574989475).

The spelling of 551544320 in words is "five hundred fifty-one million, five hundred forty-four thousand, three hundred twenty".