13538219 has 4 divisors (see below), whose sum is σ = 13551720. Its totient is φ = 13524720.

The previous prime is 13538197. The next prime is 13538233. The reversal of 13538219 is 91283531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13538219 is a prime.

It is a super-2 number, since 2×13538219² = 366566747383922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13538269) 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, 5114 + ... + 7295.

It is an arithmetic number, because the mean of its divisors is an integer number (3387930).

Almost surely, 2^13538219 is an apocalyptic number.

13538219 is a deficient number, since it is larger than the sum of its proper divisors (13501).

13538219 is a wasteful number, since it uses less digits than its factorization.

13538219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13500.

The product of its digits is 6480, while the sum is 32.

The square root of 13538219 is about 3679.4318854954. The cubic root of 13538219 is about 238.3346456424.

The spelling of 13538219 in words is "thirteen million, five hundred thirty-eight thousand, two hundred nineteen".