5220253351521 has 80 divisors (see below), whose sum is σ = 8446854322368. Its totient is φ = 3193813929600.

The previous prime is 5220253351499. The next prime is 5220253351531. The reversal of 5220253351521 is 1251533520225.

5220253351521 is a `hidden beast` number, since 5 + 2 + 2 + 0 + 253 + 351 + 52 + 1 = 666.

It is not a de Polignac number, because 5220253351521 - 2⁹ = 5220253351009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5220253351531) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 215727595 + ... + 215751791.

Almost surely, 2^{5220253351521} is an apocalyptic number.

It is an amenable number.

5220253351521 is a deficient number, since it is larger than the sum of its proper divisors (3226600970847).

5220253351521 is a wasteful number, since it uses less digits than its factorization.

5220253351521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25404 (or 25395 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 5220253351521 its reverse (1251533520225), we get a palindrome (6471786871746).

The spelling of 5220253351521 in words is "five trillion, two hundred twenty billion, two hundred fifty-three million, three hundred fifty-one thousand, five hundred twenty-one".