2566253220 has 24 divisors (see below), whose sum is σ = 7185509184. Its totient is φ = 684334176.

The previous prime is 2566253177. The next prime is 2566253227. The reversal of 2566253220 is 223526652.

It is not an unprimeable number, because it can be changed into a prime (2566253227) 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 in 7 ways as a sum of consecutive naturals, for example, 21385384 + ... + 21385503.

It is an arithmetic number, because the mean of its divisors is an integer number (299396216).

Almost surely, 2^2566253220 is an apocalyptic number.

2566253220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566253220 is an abundant number, since it is smaller than the sum of its proper divisors (4619255964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2566253220 is a wasteful number, since it uses less digits than its factorization.

2566253220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42770899 (or 42770897 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 2566253220 is about 50658.1999285407. The cubic root of 2566253220 is about 1369.0936908032.

Adding to 2566253220 its reverse (223526652), we get a palindrome (2789779872).

The spelling of 2566253220 in words is "two billion, five hundred sixty-six million, two hundred fifty-three thousand, two hundred twenty".