2530221 has 16 divisors (see below), whose sum is σ = 3532800. Its totient is φ = 1608768.

The previous prime is 2530201. The next prime is 2530223. The reversal of 2530221 is 1220352.

It is a de Polignac number, because none of the positive numbers 2^k-2530221 is a prime.

2530221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2530221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2530223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10935 + ... + 11163.

It is an arithmetic number, because the mean of its divisors is an integer number (220800).

2^2530221 is an apocalyptic number.

It is an amenable number.

2530221 is a deficient number, since it is larger than the sum of its proper divisors (1002579).

2530221 is a wasteful number, since it uses less digits than its factorization.

2530221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2530221 is about 1590.6668412964. Note that the first 3 decimals coincide. The cubic root of 2530221 is about 136.2655746301.

Adding to 2530221 its reverse (1220352), we get a palindrome (3750573).

The spelling of 2530221 in words is "two million, five hundred thirty thousand, two hundred twenty-one".