2521057540 has 24 divisors (see below), whose sum is σ = 5319320832. Its totient is φ = 1003642080.

The previous prime is 2521057523. The next prime is 2521057543. The reversal of 2521057540 is 457501252.

It is a super-2 number, since 2×2521057540² = 12711462239981703200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2521057543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294484 + ... + 302923.

It is an arithmetic number, because the mean of its divisors is an integer number (221638368).

Almost surely, 2^2521057540 is an apocalyptic number.

2521057540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521057540 is an abundant number, since it is smaller than the sum of its proper divisors (2798263292).

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

2521057540 is a wasteful number, since it uses less digits than its factorization.

2521057540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597627 (or 597625 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 2521057540 is about 50210.1338377025. The cubic root of 2521057540 is about 1361.0087563453.

Adding to 2521057540 its reverse (457501252), we get a palindrome (2978558792).

The spelling of 2521057540 in words is "two billion, five hundred twenty-one million, fifty-seven thousand, five hundred forty".