5115253440 has 224 divisors, whose sum is σ = 17841772800. Its totient is φ = 1231360000.

The previous prime is 5115253417. The next prime is 5115253477. The reversal of 5115253440 is 443525115.

It is a Cunningham number, because it is equal to 71521²-1.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 5115253398 and 5115253407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1571815 + ... + 1575065.

Almost surely, 2^5115253440 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 5115253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8920886400).

5115253440 is an abundant number, since it is smaller than the sum of its proper divisors (12726519360).

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

5115253440 is a wasteful number, since it uses less digits than its factorization.

5115253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431 (or 3421 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 5115253440 is about 71520.9999930090. Note that the first 5 decimals coincide. The cubic root of 5115253440 is about 1723.0149751898.

Adding to 5115253440 its reverse (443525115), we get a palindrome (5558778555).

The spelling of 5115253440 in words is "five billion, one hundred fifteen million, two hundred fifty-three thousand, four hundred forty".