2125566256 has 80 divisors (see below), whose sum is σ = 4573957248. Its totient is φ = 948838400.

The previous prime is 2125566251. The next prime is 2125566277. The reversal of 2125566256 is 6526655212.

It is not an unprimeable number, because it can be changed into a prime (2125566251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3315696 + ... + 3316336.

Almost surely, 2^2125566256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2125566256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2286978624).

2125566256 is an abundant number, since it is smaller than the sum of its proper divisors (2448390992).

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

2125566256 is a wasteful number, since it uses less digits than its factorization.

2125566256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 964 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The square root of 2125566256 is about 46103.8637860212. The cubic root of 2125566256 is about 1285.7549815502.

It can be divided in two parts, 212556 and 6256, that added together give a palindrome (218812).

The spelling of 2125566256 in words is "two billion, one hundred twenty-five million, five hundred sixty-six thousand, two hundred fifty-six".