2521116540 has 144 divisors (see below), whose sum is σ = 7938368256. Its totient is φ = 646963200.

The previous prime is 2521116487. The next prime is 2521116547. The reversal of 2521116540 is 456111252.

2521116540 is a `hidden beast` number, since 2 + 5 + 2 + 1 + 1 + 1 + 654 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521116547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1075770 + ... + 1078110.

Almost surely, 2^2521116540 is an apocalyptic number.

2521116540 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 2521116540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3969184128).

2521116540 is an abundant number, since it is smaller than the sum of its proper divisors (5417251716).

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

2521116540 is a wasteful number, since it uses less digits than its factorization.

2521116540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580 (or 2575 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2521116540 is about 50210.7213650631. The cubic root of 2521116540 is about 1361.0193734361.

Adding to 2521116540 its reverse (456111252), we get a palindrome (2977227792).

The spelling of 2521116540 in words is "two billion, five hundred twenty-one million, one hundred sixteen thousand, five hundred forty".