210205530 has 80 divisors (see below), whose sum is σ = 569590560. Its totient is φ = 55621728.

The previous prime is 210205529. The next prime is 210205537. The reversal of 210205530 is 35502012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (210205537) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 111657 + ... + 113523.

It is an arithmetic number, because the mean of its divisors is an integer number (7119882).

Almost surely, 2^210205530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210205530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284795280).

210205530 is an abundant number, since it is smaller than the sum of its proper divisors (359385030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210205530 is a wasteful number, since it uses less digits than its factorization.

210205530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 210205530 is about 14498.4664706306. The cubic root of 210205530 is about 594.5860454264.

Adding to 210205530 its reverse (35502012), we get a palindrome (245707542).

The spelling of 210205530 in words is "two hundred ten million, two hundred five thousand, five hundred thirty".