551320224 has 192 divisors, whose sum is σ = 1795497984. Its totient is φ = 144239616.

The previous prime is 551320141. The next prime is 551320241. The reversal of 551320224 is 422023155.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 551320194 and 551320203.

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 31 ways as a sum of consecutive naturals, for example, 1947987 + ... + 1948269.

It is an arithmetic number, because the mean of its divisors is an integer number (9351552).

Almost surely, 2^551320224 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 551320224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897748992).

551320224 is an abundant number, since it is smaller than the sum of its proper divisors (1244177760).

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

551320224 is a wasteful number, since it uses less digits than its factorization.

551320224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 551320224 is about 23480.2091983866. The cubic root of 551320224 is about 819.9763150010.

Adding to 551320224 its reverse (422023155), we get a palindrome (973343379).

The spelling of 551320224 in words is "five hundred fifty-one million, three hundred twenty thousand, two hundred twenty-four".