2521315525 has 24 divisors (see below), whose sum is σ = 3179386784. Its totient is φ = 1983009600.

The previous prime is 2521315483. The next prime is 2521315547. The reversal of 2521315525 is 5255131252.

It is not a de Polignac number, because 2521315525 - 2⁷ = 2521315397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1075855 + ... + 1078195.

Almost surely, 2^2521315525 is an apocalyptic number.

2521315525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2521315525 is a deficient number, since it is larger than the sum of its proper divisors (658071259).

2521315525 is a wasteful number, since it uses less digits than its factorization.

2521315525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061 (or 3056 counting only the distinct ones).

The product of its digits is 15000, while the sum is 31.

The square root of 2521315525 is about 50212.7028250820. The cubic root of 2521315525 is about 1361.0551797030.

Adding to 2521315525 its reverse (5255131252), we get a palindrome (7776446777).

The spelling of 2521315525 in words is "two billion, five hundred twenty-one million, three hundred fifteen thousand, five hundred twenty-five".