5255521240 has 32 divisors (see below), whose sum is σ = 11886209280. Its totient is φ = 2091313152.

The previous prime is 5255521217. The next prime is 5255521241. The reversal of 5255521240 is 421255525.

It is a happy number.

It is a super-2 number, since 2×5255521240² = 55241007008182275200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5255521241) 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, 332664 + ... + 348103.

It is an arithmetic number, because the mean of its divisors is an integer number (371444040).

Almost surely, 2^5255521240 is an apocalyptic number.

It is an amenable number.

5255521240 is an abundant number, since it is smaller than the sum of its proper divisors (6630688040).

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

5255521240 is a wasteful number, since it uses less digits than its factorization.

5255521240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680971 (or 680967 counting only the distinct ones).

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

The square root of 5255521240 is about 72494.9738947467. The cubic root of 5255521240 is about 1738.6223781079.

Adding to 5255521240 its reverse (421255525), we get a palindrome (5676776765).

The spelling of 5255521240 in words is "five billion, two hundred fifty-five million, five hundred twenty-one thousand, two hundred forty".