2510221 has 6 divisors (see below), whose sum is σ = 2920110. Its totient is φ = 2151576.

The previous prime is 2510219. The next prime is 2510227. The reversal of 2510221 is 1220152.

2510221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 741321 = 1330^2 + 861^2 .

It is not a de Polignac number, because 2510221 - 2¹ = 2510219 is a prime.

It is a Duffinian number.

2510221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2510227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25566 + ... + 25663.

It is an arithmetic number, because the mean of its divisors is an integer number (486685).

2^2510221 is an apocalyptic number.

It is an amenable number.

2510221 is a deficient number, since it is larger than the sum of its proper divisors (409889).

2510221 is an equidigital number, since it uses as much as digits as its factorization.

2510221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51243 (or 51236 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2510221 is about 1584.3676972218. The cubic root of 2510221 is about 135.9055897531.

Adding to 2510221 its reverse (1220152), we get a palindrome (3730373).

The spelling of 2510221 in words is "two million, five hundred ten thousand, two hundred twenty-one".