13553523 has 12 divisors (see below), whose sum is σ = 19653088. Its totient is φ = 9000720.

The previous prime is 13553513. The next prime is 13553537. The reversal of 13553523 is 32535531.

13553523 is a `hidden beast` number, since 135 + 5 + 3 + 523 = 666.

It is not a de Polignac number, because 13553523 - 2⁶ = 13553459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13553503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340 + ... + 5217.

Almost surely, 2^13553523 is an apocalyptic number.

13553523 is a deficient number, since it is larger than the sum of its proper divisors (6099565).

13553523 is a wasteful number, since it uses less digits than its factorization.

13553523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834 (or 5831 counting only the distinct ones).

The product of its digits is 6750, while the sum is 27.

The square root of 13553523 is about 3681.5109669808. The cubic root of 13553523 is about 238.4244186491.

It can be divided in two parts, 13 and 553523, that added together give a square (553536 = 744²).

The spelling of 13553523 in words is "thirteen million, five hundred fifty-three thousand, five hundred twenty-three".