5255251240 has 64 divisors (see below), whose sum is σ = 12379651200. Its totient is φ = 2005124352.

The previous prime is 5255251231. The next prime is 5255251247. The reversal of 5255251240 is 421525525.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5255251247) 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, 68989 + ... + 123571.

It is an arithmetic number, because the mean of its divisors is an integer number (193432050).

Almost surely, 2^5255251240 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 5255251240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6189825600).

5255251240 is an abundant number, since it is smaller than the sum of its proper divisors (7124399960).

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

5255251240 is a wasteful number, since it uses less digits than its factorization.

5255251240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54706 (or 54702 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 5255251240 is about 72493.1116727652. Note that the first 3 decimals coincide. The cubic root of 5255251240 is about 1738.5926039549.

Adding to 5255251240 its reverse (421525525), we get a palindrome (5676776765).

The spelling of 5255251240 in words is "five billion, two hundred fifty-five million, two hundred fifty-one thousand, two hundred forty".