13591216 has 20 divisors (see below), whose sum is σ = 26393400. Its totient is φ = 6780032.

The previous prime is 13591157. The next prime is 13591217. The reversal of 13591216 is 61219531.

13591216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (13591217) 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, 9900 + ... + 11188.

It is an arithmetic number, because the mean of its divisors is an integer number (1319670).

Almost surely, 2^13591216 is an apocalyptic number.

13591216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13591216 is a deficient number, since it is larger than the sum of its proper divisors (12802184).

13591216 is a wasteful number, since it uses less digits than its factorization.

13591216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1950 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 13591216 is about 3686.6266423385. The cubic root of 13591216 is about 238.6452373354.

The spelling of 13591216 in words is "thirteen million, five hundred ninety-one thousand, two hundred sixteen".