5115131440 has 40 divisors (see below), whose sum is σ = 12276321408. Its totient is φ = 1980049920.

The previous prime is 5115131381. The next prime is 5115131467. The reversal of 5115131440 is 441315115.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028797 + ... + 1033756.

Almost surely, 2^5115131440 is an apocalyptic number.

It is an amenable number.

5115131440 is an abundant number, since it is smaller than the sum of its proper divisors (7161189968).

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

5115131440 is a wasteful number, since it uses less digits than its factorization.

5115131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062597 (or 2062591 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 5115131440 is about 71520.1470915713. The cubic root of 5115131440 is about 1723.0012769765.

Adding to 5115131440 its reverse (441315115), we get a palindrome (5556446555).

The spelling of 5115131440 in words is "five billion, one hundred fifteen million, one hundred thirty-one thousand, four hundred forty".