13520215525 has 24 divisors (see below), whose sum is σ = 16932666240. Its totient is φ = 10708266240.

The previous prime is 13520215523. The next prime is 13520215591. The reversal of 13520215525 is 52551202531.

It is not a de Polignac number, because 13520215525 - 2¹ = 13520215523 is a prime.

It is a super-3 number, since 3×13520215525³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520215523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3113806 + ... + 3118144.

It is an arithmetic number, because the mean of its divisors is an integer number (705527760).

Almost surely, 2^13520215525 is an apocalyptic number.

It is an amenable number.

13520215525 is a deficient number, since it is larger than the sum of its proper divisors (3412450715).

13520215525 is a wasteful number, since it uses less digits than its factorization.

13520215525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565 (or 5560 counting only the distinct ones).

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

The spelling of 13520215525 in words is "thirteen billion, five hundred twenty million, two hundred fifteen thousand, five hundred twenty-five".