509539225 has 24 divisors (see below), whose sum is σ = 684530840. Its totient is φ = 376234560.

The previous prime is 509539223. The next prime is 509539229. The reversal of 509539225 is 522935905.

It can be written as a sum of positive squares in 12 ways, for example, as 482944576 + 26594649 = 21976^2 + 5157^2 .

It is not a de Polignac number, because 509539225 - 2¹ = 509539223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (509539223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50287 + ... + 59563.

Almost surely, 2^509539225 is an apocalyptic number.

It is an amenable number.

509539225 is a deficient number, since it is larger than the sum of its proper divisors (174991615).

509539225 is an equidigital number, since it uses as much as digits as its factorization.

509539225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326 (or 9295 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 509539225 is about 22572.9755459930. The cubic root of 509539225 is about 798.7162875589.

The spelling of 509539225 in words is "five hundred nine million, five hundred thirty-nine thousand, two hundred twenty-five".