2551604244 has 144 divisors (see below), whose sum is σ = 7138639872. Its totient is φ = 706926528.

The previous prime is 2551604243. The next prime is 2551604287. The reversal of 2551604244 is 4424061552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551604243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3509409 + ... + 3510135.

It is an arithmetic number, because the mean of its divisors is an integer number (49573888).

Almost surely, 2^2551604244 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 2551604244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3569319936).

2551604244 is an abundant number, since it is smaller than the sum of its proper divisors (4587035628).

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

2551604244 is a wasteful number, since it uses less digits than its factorization.

2551604244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 2551604244 is about 50513.4065768683. The cubic root of 2551604244 is about 1366.4836465075.

Adding to 2551604244 its reverse (4424061552), we get a palindrome (6975665796).

The spelling of 2551604244 in words is "two billion, five hundred fifty-one million, six hundred four thousand, two hundred forty-four".