2560520221 has 4 divisors (see below), whose sum is σ = 2926308832. Its totient is φ = 2194731612.

The previous prime is 2560520159. The next prime is 2560520227. The reversal of 2560520221 is 1220250652.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2560520221 - 2²⁵ = 2526965789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560520227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182894295 + ... + 182894308.

It is an arithmetic number, because the mean of its divisors is an integer number (731577208).

Almost surely, 2^2560520221 is an apocalyptic number.

It is an amenable number.

2560520221 is a deficient number, since it is larger than the sum of its proper divisors (365788611).

2560520221 is an equidigital number, since it uses as much as digits as its factorization.

2560520221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365788610.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2560520221 is about 50601.5831866949. The cubic root of 2560520221 is about 1368.0734141275.

Adding to 2560520221 its reverse (1220250652), we get a palindrome (3780770873).

The spelling of 2560520221 in words is "two billion, five hundred sixty million, five hundred twenty thousand, two hundred twenty-one".