530355721 has 16 divisors (see below), whose sum is σ = 640604160. Its totient is φ = 428922000.

The previous prime is 530355713. The next prime is 530355733. The reversal of 530355721 is 127553035.

It is a cyclic number.

It is not a de Polignac number, because 530355721 - 2³ = 530355713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (530355121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25440 + ... + 41326.

It is an arithmetic number, because the mean of its divisors is an integer number (40037760).

Almost surely, 2^530355721 is an apocalyptic number.

It is an amenable number.

530355721 is a deficient number, since it is larger than the sum of its proper divisors (110248439).

530355721 is a wasteful number, since it uses less digits than its factorization.

530355721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16164.

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 530355721 is about 23029.4533369770. The cubic root of 530355721 is about 809.4482453871.

The spelling of 530355721 in words is "five hundred thirty million, three hundred fifty-five thousand, seven hundred twenty-one".