551287280 has 80 divisors (see below), whose sum is σ = 1366579200. Its totient is φ = 206219520.

The previous prime is 551287279. The next prime is 551287283. The reversal of 551287280 is 82782155.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551287283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117785 + ... + 122375.

It is an arithmetic number, because the mean of its divisors is an integer number (17082240).

Almost surely, 2^551287280 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 551287280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683289600).

551287280 is an abundant number, since it is smaller than the sum of its proper divisors (815291920).

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

551287280 is a wasteful number, since it uses less digits than its factorization.

551287280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702 (or 4696 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 551287280 is about 23479.5076609370. The cubic root of 551287280 is about 819.9599821835.

The spelling of 551287280 in words is "five hundred fifty-one million, two hundred eighty-seven thousand, two hundred eighty".