530556021 has 16 divisors (see below), whose sum is σ = 795961600. Its totient is φ = 349225344.

The previous prime is 530556017. The next prime is 530556107. The reversal of 530556021 is 120655035.

530556021 is a `hidden beast` number, since 5 + 3 + 0 + 55 + 602 + 1 = 666.

It is not a de Polignac number, because 530556021 - 2² = 530556017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530556721) 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 15 ways as a sum of consecutive naturals, for example, 122236 + ... + 126501.

It is an arithmetic number, because the mean of its divisors is an integer number (49747600).

Almost surely, 2^530556021 is an apocalyptic number.

It is an amenable number.

530556021 is a deficient number, since it is larger than the sum of its proper divisors (265405579).

530556021 is a wasteful number, since it uses less digits than its factorization.

530556021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248825 (or 248819 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 530556021 is about 23033.8017053199. The cubic root of 530556021 is about 809.5501342832.

The spelling of 530556021 in words is "five hundred thirty million, five hundred fifty-six thousand, twenty-one".