5251221525 has 36 divisors (see below), whose sum is σ = 9543062816. Its totient is φ = 2546042400.

The previous prime is 5251221523. The next prime is 5251221571.

5251221525 is nontrivially palindromic in base 10.

5251221525 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5251221525 - 2¹ = 5251221523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5251221492 and 5251221501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251221523) 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 35 ways as a sum of consecutive naturals, for example, 280249 + ... + 298398.

Almost surely, 2^5251221525 is an apocalyptic number.

5251221525 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5251221525 is a deficient number, since it is larger than the sum of its proper divisors (4291841291).

5251221525 is a wasteful number, since it uses less digits than its factorization.

5251221525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578682 (or 578666 counting only the distinct ones).

The product of its digits is 10000, while the sum is 30.

The square root of 5251221525 is about 72465.3125640123. The cubic root of 5251221525 is about 1738.1481073378.

The spelling of 5251221525 in words is "five billion, two hundred fifty-one million, two hundred twenty-one thousand, five hundred twenty-five".