2103515440 has 160 divisors (see below), whose sum is σ = 5410903680. Its totient is φ = 755785728.

The previous prime is 2103515437. The next prime is 2103515443. The reversal of 2103515440 is 445153012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2103515437) and next prime (2103515443).

It is not an unprimeable number, because it can be changed into a prime (2103515443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7819626 + ... + 7819894.

It is an arithmetic number, because the mean of its divisors is an integer number (33818148).

Almost surely, 2^2103515440 is an apocalyptic number.

2103515440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2103515440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2705451840).

2103515440 is an abundant number, since it is smaller than the sum of its proper divisors (3307388240).

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

2103515440 is a wasteful number, since it uses less digits than its factorization.

2103515440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2103515440 is about 45864.0975055653. The cubic root of 2103515440 is about 1281.2933379273.

Adding to 2103515440 its reverse (445153012), we get a palindrome (2548668452).

The spelling of 2103515440 in words is "two billion, one hundred three million, five hundred fifteen thousand, four hundred forty".