530721300 has 144 divisors (see below), whose sum is σ = 1711765440. Its totient is φ = 126167040.

The previous prime is 530721239. The next prime is 530721307. The reversal of 530721300 is 3127035.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530721307) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 94162 + ... + 99638.

It is an arithmetic number, because the mean of its divisors is an integer number (11887260).

Almost surely, 2^530721300 is an apocalyptic number.

530721300 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 530721300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855882720).

530721300 is an abundant number, since it is smaller than the sum of its proper divisors (1181044140).

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

530721300 is a wasteful number, since it uses less digits than its factorization.

530721300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530 (or 5523 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 530721300 is about 23037.3891749912. The cubic root of 530721300 is about 809.6341893373.

Adding to 530721300 its reverse (3127035), we get a palindrome (533848335).

The spelling of 530721300 in words is "five hundred thirty million, seven hundred twenty-one thousand, three hundred".