210530 has 16 divisors (see below), whose sum is σ = 389880. Its totient is φ = 81792.

The previous prime is 210527. The next prime is 210533. The reversal of 210530 is 35012.

210530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (210527) and next prime (210533).

It can be written as a sum of positive squares in 4 ways, for example, as 175561 + 34969 = 419^2 + 187^2 .

It is not an unprimeable number, because it can be changed into a prime (210533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86 + ... + 654.

2²¹⁰⁵³⁰ is an apocalyptic number.

210530 is a deficient number, since it is larger than the sum of its proper divisors (179350).

210530 is a wasteful number, since it uses less digits than its factorization.

210530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 210530 is about 458.8354824989. The cubic root of 210530 is about 59.4891819421.

Adding to 210530 its reverse (35012), we get a palindrome (245542).

The spelling of 210530 in words is "two hundred ten thousand, five hundred thirty".