13531201523 has 4 divisors (see below), whose sum is σ = 15464230320. Its totient is φ = 11598172728.

The previous prime is 13531201417. The next prime is 13531201549. The reversal of 13531201523 is 32510213531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13531201523 - 2²⁸ = 13262766067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13531201492 and 13531201501.

It is not an unprimeable number, because it can be changed into a prime (13531201573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966514388 + ... + 966514401.

It is an arithmetic number, because the mean of its divisors is an integer number (3866057580).

Almost surely, 2^13531201523 is an apocalyptic number.

13531201523 is a deficient number, since it is larger than the sum of its proper divisors (1933028797).

13531201523 is an equidigital number, since it uses as much as digits as its factorization.

13531201523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933028796.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 13531201523 in words is "thirteen billion, five hundred thirty-one million, two hundred one thousand, five hundred twenty-three".