551214720 has 640 divisors, whose sum is σ = 2369664000. Its totient is φ = 121927680.

The previous prime is 551214707. The next prime is 551214739. The reversal of 551214720 is 27412155.

551214720 is a `hidden beast` number, since 5 + 512 + 147 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 79 ways as a sum of consecutive naturals, for example, 17781105 + ... + 17781135.

It is an arithmetic number, because the mean of its divisors is an integer number (3702600).

Almost surely, 2^551214720 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 551214720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184832000).

551214720 is an abundant number, since it is smaller than the sum of its proper divisors (1818449280).

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

551214720 is an equidigital number, since it uses as much as digits as its factorization.

551214720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 551214720 is about 23477.9624328859. The cubic root of 551214720 is about 819.9240064415.

Adding to 551214720 its reverse (27412155), we get a palindrome (578626875).

The spelling of 551214720 in words is "five hundred fifty-one million, two hundred fourteen thousand, seven hundred twenty".