5115213440 has 128 divisors (see below), whose sum is σ = 12922502400. Its totient is φ = 1930825728.

The previous prime is 5115213413. The next prime is 5115213473. The reversal of 5115213440 is 443125115.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3854057 + ... + 3855383.

It is an arithmetic number, because the mean of its divisors is an integer number (100957050).

Almost surely, 2^5115213440 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 5115213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6461251200).

5115213440 is an abundant number, since it is smaller than the sum of its proper divisors (7807288960).

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

5115213440 is a wasteful number, since it uses less digits than its factorization.

With its successor (5115213441) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (1682).

5115213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 5115213440 is about 71520.7203543141. The cubic root of 5115213440 is about 1723.0104839963.

Adding to 5115213440 its reverse (443125115), we get a palindrome (5558338555).

The spelling of 5115213440 in words is "five billion, one hundred fifteen million, two hundred thirteen thousand, four hundred forty".