13531203523 has 4 divisors (see below), whose sum is σ = 13574712528. Its totient is φ = 13487694520.

The previous prime is 13531203481. The next prime is 13531203541. The reversal of 13531203523 is 32530213531.

13531203523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13531203523 - 2²⁵ = 13497649091 is a prime.

It is a super-2 number, since 2×13531203523² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13531203491 and 13531203500.

It is not an unprimeable number, because it can be changed into a prime (13531203563) 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 3 ways as a sum of consecutive naturals, for example, 21754036 + ... + 21754657.

It is an arithmetic number, because the mean of its divisors is an integer number (3393678132).

Almost surely, 2^13531203523 is an apocalyptic number.

13531203523 is a deficient number, since it is larger than the sum of its proper divisors (43509005).

13531203523 is an equidigital number, since it uses as much as digits as its factorization.

13531203523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43509004.

The product of its (nonzero) digits is 8100, while the sum is 28.

The spelling of 13531203523 in words is "thirteen billion, five hundred thirty-one million, two hundred three thousand, five hundred twenty-three".