13520111523 has 8 divisors (see below), whose sum is σ = 18975595200. Its totient is φ = 8539017768.

The previous prime is 13520111491. The next prime is 13520111531. The reversal of 13520111523 is 32511102531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13520111523 - 2⁵ = 13520111491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13520111493 and 13520111502.

It is not an unprimeable number, because it can be changed into a prime (13520111533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118597413 + ... + 118597526.

It is an arithmetic number, because the mean of its divisors is an integer number (2371949400).

Almost surely, 2^13520111523 is an apocalyptic number.

13520111523 is a deficient number, since it is larger than the sum of its proper divisors (5455483677).

13520111523 is a wasteful number, since it uses less digits than its factorization.

13520111523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237194961.

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 13520111523 in words is "thirteen billion, five hundred twenty million, one hundred eleven thousand, five hundred twenty-three".