530555021 has 4 divisors (see below), whose sum is σ = 537822972. Its totient is φ = 523287072.

The previous prime is 530555017. The next prime is 530555033. The reversal of 530555021 is 120555035.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 241180900 + 289374121 = 15530^2 + 17011^2 .

It is a cyclic number.

It is not a de Polignac number, because 530555021 - 2² = 530555017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530555041) 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 3 ways as a sum of consecutive naturals, for example, 3633866 + ... + 3634011.

It is an arithmetic number, because the mean of its divisors is an integer number (134455743).

Almost surely, 2^530555021 is an apocalyptic number.

It is an amenable number.

530555021 is a deficient number, since it is larger than the sum of its proper divisors (7267951).

530555021 is an equidigital number, since it uses as much as digits as its factorization.

530555021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267950.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 530555021 is about 23033.7799980811. The cubic root of 530555021 is about 809.5496256655.

The spelling of 530555021 in words is "five hundred thirty million, five hundred fifty-five thousand, twenty-one".