2521210540 has 48 divisors (see below), whose sum is σ = 5453963424. Its totient is φ = 978393600.

The previous prime is 2521210463. The next prime is 2521210543. The reversal of 2521210540 is 450121252.

2521210540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2521210543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139927 + ... + 156913.

It is an arithmetic number, because the mean of its divisors is an integer number (113624238).

Almost surely, 2^2521210540 is an apocalyptic number.

2521210540 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 2521210540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2726981712).

2521210540 is an abundant number, since it is smaller than the sum of its proper divisors (2932752884).

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

2521210540 is a wasteful number, since it uses less digits than its factorization.

2521210540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17218 (or 17216 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2521210540 is about 50211.6574114020. The cubic root of 2521210540 is about 1361.0362884589.

Adding to 2521210540 its reverse (450121252), we get a palindrome (2971331792).

The spelling of 2521210540 in words is "two billion, five hundred twenty-one million, two hundred ten thousand, five hundred forty".