531280000 has 160 divisors (see below), whose sum is σ = 1374169500. Its totient is φ = 204288000.

The previous prime is 531279997. The next prime is 531280027. The reversal of 531280000 is 82135.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 69696 + 531210304 = 264^2 + 23048^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 531280000.

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 19 ways as a sum of consecutive naturals, for example, 2319886 + ... + 2320114.

Almost surely, 2^531280000 is an apocalyptic number.

531280000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687084750).

531280000 is an abundant number, since it is smaller than the sum of its proper divisors (842889500).

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

531280000 is an equidigital number, since it uses as much as digits as its factorization.

531280000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 531280000 is about 23049.5119254183. The cubic root of 531280000 is about 809.9181952644.

The spelling of 531280000 in words is "five hundred thirty-one million, two hundred eighty thousand".