2556421300 has 18 divisors (see below), whose sum is σ = 5547434438. Its totient is φ = 1022568480.

The previous prime is 2556421297. The next prime is 2556421303. The reversal of 2556421300 is 31246552.

It is an interprime number because it is at equal distance from previous prime (2556421297) and next prime (2556421303).

It can be written as a sum of positive squares in 3 ways, for example, as 115863696 + 2440557604 = 10764^2 + 49402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556421303) 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 5 ways as a sum of consecutive naturals, for example, 12782007 + ... + 12782206.

Almost surely, 2^2556421300 is an apocalyptic number.

2556421300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2556421300 is an abundant number, since it is smaller than the sum of its proper divisors (2991013138).

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

2556421300 is a wasteful number, since it uses less digits than its factorization.

2556421300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25564227 (or 25564220 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2556421300 is about 50561.0650599846. The cubic root of 2556421300 is about 1367.3430131042.

Adding to 2556421300 its reverse (31246552), we get a palindrome (2587667852).

It can be divided in two parts, 25564 and 21300, that added together give a palindrome (46864).

The spelling of 2556421300 in words is "two billion, five hundred fifty-six million, four hundred twenty-one thousand, three hundred".