13538211 has 4 divisors (see below), whose sum is σ = 18050952. Its totient is φ = 9025472.

The previous prime is 13538197. The next prime is 13538233. The reversal of 13538211 is 11283531.

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 13538211 - 2⁵ = 13538179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13538111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2256366 + ... + 2256371.

It is an arithmetic number, because the mean of its divisors is an integer number (4512738).

Almost surely, 2^13538211 is an apocalyptic number.

13538211 is a deficient number, since it is larger than the sum of its proper divisors (4512741).

13538211 is an equidigital number, since it uses as much as digits as its factorization.

13538211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512740.

The product of its digits is 720, while the sum is 24.

The square root of 13538211 is about 3679.4307983709. The cubic root of 13538211 is about 238.3345986968.

The spelling of 13538211 in words is "thirteen million, five hundred thirty-eight thousand, two hundred eleven".