2521210525 has 24 divisors (see below), whose sum is σ = 3228945120. Its totient is φ = 1951364160.

The previous prime is 2521210463. The next prime is 2521210543. The reversal of 2521210525 is 5250121252.

It is not a de Polignac number, because 2521210525 - 2⁷ = 2521210397 is a prime.

It is a super-2 number, since 2×2521210525² = 12713005022741551250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2521210525.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 157962 + ... + 173188.

It is an arithmetic number, because the mean of its divisors is an integer number (134539380).

Almost surely, 2^2521210525 is an apocalyptic number.

2521210525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2521210525 is a deficient number, since it is larger than the sum of its proper divisors (707734595).

2521210525 is a wasteful number, since it uses less digits than its factorization.

2521210525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15453 (or 15448 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2521210525 is about 50211.6572620343. The cubic root of 2521210525 is about 1361.0362857597.

Adding to 2521210525 its reverse (5250121252), we get a palindrome (7771331777).

The spelling of 2521210525 in words is "two billion, five hundred twenty-one million, two hundred ten thousand, five hundred twenty-five".