2210561 has 6 divisors (see below), whose sum is σ = 2348550. Its totient is φ = 2080256.

The previous prime is 2210521. The next prime is 2210563. The reversal of 2210561 is 1650122.

It can be written as a sum of positive squares in 3 ways, for example, as 336400 + 1874161 = 580^2 + 1369^2 .

It is not a de Polignac number, because 2210561 - 2⁶ = 2210497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

2210561 is a modest number, since divided by 561 gives 221 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2210563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3536 + ... + 4113.

It is an arithmetic number, because the mean of its divisors is an integer number (391425).

2^2210561 is an apocalyptic number.

It is an amenable number.

2210561 is a deficient number, since it is larger than the sum of its proper divisors (137989).

2210561 is an equidigital number, since it uses as much as digits as its factorization.

2210561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7683 (or 7666 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2210561 is about 1486.7955474779. The cubic root of 2210561 is about 130.2669268934.

Adding to 2210561 its reverse (1650122), we get a palindrome (3860683).

The spelling of 2210561 in words is "two million, two hundred ten thousand, five hundred sixty-one".