2520603221 has 2 divisors, whose sum is σ = 2520603222. Its totient is φ = 2520603220.

The previous prime is 2520603157. The next prime is 2520603247. The reversal of 2520603221 is 1223060252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1986484900 + 534118321 = 44570^2 + 23111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520603221 - 2⁶ = 2520603157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520603721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260301610 + 1260301611.

It is an arithmetic number, because the mean of its divisors is an integer number (1260301611).

Almost surely, 2^2520603221 is an apocalyptic number.

It is an amenable number.

2520603221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520603221 is an equidigital number, since it uses as much as digits as its factorization.

2520603221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2520603221 is about 50205.6094575098. The cubic root of 2520603221 is about 1360.9269957780.

Adding to 2520603221 its reverse (1223060252), we get a palindrome (3743663473).

The spelling of 2520603221 in words is "two billion, five hundred twenty million, six hundred three thousand, two hundred twenty-one".