561207210 has 64 divisors (see below), whose sum is σ = 1378460160. Its totient is φ = 146188800.

The previous prime is 561207203. The next prime is 561207271. The reversal of 561207210 is 12702165.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237535 + ... + 239885.

It is an arithmetic number, because the mean of its divisors is an integer number (21538440).

Almost surely, 2^561207210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561207210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689230080).

561207210 is an abundant number, since it is smaller than the sum of its proper divisors (817252950).

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

561207210 is a wasteful number, since it uses less digits than its factorization.

561207210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 561207210 is about 23689.8123673447. The cubic root of 561207210 is about 824.8489273421.

Adding to 561207210 its reverse (12702165), we get a palindrome (573909375).

The spelling of 561207210 in words is "five hundred sixty-one million, two hundred seven thousand, two hundred ten".