530305261 has 2 divisors, whose sum is σ = 530305262. Its totient is φ = 530305260.

The previous prime is 530305253. The next prime is 530305267. The reversal of 530305261 is 162503035.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470629636 + 59675625 = 21694^2 + 7725^2 .

It is a cyclic number.

It is not a de Polignac number, because 530305261 - 2³ = 530305253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530305267) 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 as a sum of consecutive naturals, namely, 265152630 + 265152631.

It is an arithmetic number, because the mean of its divisors is an integer number (265152631).

Almost surely, 2^530305261 is an apocalyptic number.

It is an amenable number.

530305261 is a deficient number, since it is larger than the sum of its proper divisors (1).

530305261 is an equidigital number, since it uses as much as digits as its factorization.

530305261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 530305261 is about 23028.3577573391. The cubic root of 530305261 is about 809.4225732754.

Adding to 530305261 its reverse (162503035), we get a palindrome (692808296).

The spelling of 530305261 in words is "five hundred thirty million, three hundred five thousand, two hundred sixty-one".