2564630220 has 24 divisors (see below), whose sum is σ = 7180964784. Its totient is φ = 683901376.

The previous prime is 2564630213. The next prime is 2564630227. The reversal of 2564630220 is 220364652.

2564630220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2564630213) and next prime (2564630227).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2564630227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21371859 + ... + 21371978.

It is an arithmetic number, because the mean of its divisors is an integer number (299206866).

Almost surely, 2^2564630220 is an apocalyptic number.

2564630220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2564630220 is an abundant number, since it is smaller than the sum of its proper divisors (4616334564).

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

2564630220 is a wasteful number, since it uses less digits than its factorization.

2564630220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42743849 (or 42743847 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 2564630220 is about 50642.1782706866. The cubic root of 2564630220 is about 1368.8050069426.

Adding to 2564630220 its reverse (220364652), we get a palindrome (2784994872).

The spelling of 2564630220 in words is "two billion, five hundred sixty-four million, six hundred thirty thousand, two hundred twenty".