13538571 has 4 divisors (see below), whose sum is σ = 18051432. Its totient is φ = 9025712.

The previous prime is 13538557. The next prime is 13538573. The reversal of 13538571 is 17583531.

13538571 is digitally balanced in base 2 and base 4, because in such bases 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 13538571 - 2¹³ = 13530379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13538573) 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, 2256426 + ... + 2256431.

It is an arithmetic number, because the mean of its divisors is an integer number (4512858).

Almost surely, 2^13538571 is an apocalyptic number.

13538571 is a deficient number, since it is larger than the sum of its proper divisors (4512861).

13538571 is an equidigital number, since it uses as much as digits as its factorization.

13538571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512860.

The product of its digits is 12600, while the sum is 33.

The square root of 13538571 is about 3679.4797186559. The cubic root of 13538571 is about 238.3367112284.

The spelling of 13538571 in words is "thirteen million, five hundred thirty-eight thousand, five hundred seventy-one".