13565216 has 48 divisors (see below), whose sum is σ = 31860864. Its totient is φ = 5558784.

The previous prime is 13565213. The next prime is 13565263. The reversal of 13565216 is 61256531.

It is not an unprimeable number, because it can be changed into a prime (13565213) 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 7 ways as a sum of consecutive naturals, for example, 3836 + ... + 6468.

It is an arithmetic number, because the mean of its divisors is an integer number (663768).

Almost surely, 2^13565216 is an apocalyptic number.

13565216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13565216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15930432).

13565216 is an abundant number, since it is smaller than the sum of its proper divisors (18295648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13565216 is a wasteful number, since it uses less digits than its factorization.

13565216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673 (or 2665 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 13565216 is about 3683.0986953922. The cubic root of 13565216 is about 238.4929640593.

The spelling of 13565216 in words is "thirteen million, five hundred sixty-five thousand, two hundred sixteen".