13538218 has 8 divisors (see below), whose sum is σ = 20640420. Its totient is φ = 6658080.

The previous prime is 13538197. The next prime is 13538233. The reversal of 13538218 is 81283531.

It can be written as a sum of positive squares in 2 ways, for example, as 10323369 + 3214849 = 3213^2 + 1793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13538218.

It is an unprimeable number.

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, 55363 + ... + 55606.

Almost surely, 2^13538218 is an apocalyptic number.

13538218 is a deficient number, since it is larger than the sum of its proper divisors (7102202).

13538218 is a wasteful number, since it uses less digits than its factorization.

13538218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111032.

The product of its digits is 5760, while the sum is 31.

The square root of 13538218 is about 3679.4317496048. The cubic root of 13538218 is about 238.3346397742.

The spelling of 13538218 in words is "thirteen million, five hundred thirty-eight thousand, two hundred eighteen".