210530705 has 48 divisors (see below), whose sum is σ = 323066880. Its totient is φ = 130233600.

The previous prime is 210530701. The next prime is 210530717. The reversal of 210530705 is 507035012.

It is not a de Polignac number, because 210530705 - 2² = 210530701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210530701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 514541 + ... + 514949.

It is an arithmetic number, because the mean of its divisors is an integer number (6730560).

Almost surely, 2^210530705 is an apocalyptic number.

It is an amenable number.

210530705 is a deficient number, since it is larger than the sum of its proper divisors (112536175).

210530705 is a wasteful number, since it uses less digits than its factorization.

210530705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 210530705 is about 14509.6762541416. The cubic root of 210530705 is about 594.8924834564.

Adding to 210530705 its reverse (507035012), we get a palindrome (717565717).

The spelling of 210530705 in words is "two hundred ten million, five hundred thirty thousand, seven hundred five".