It is a congruent number.
It is an unprimeable number.
Almost surely, 213391616 is an apocalyptic number.
13391616 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 13391616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21192192).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13391616 is an equidigital number, since it uses as much as digits as its factorization.
13391616 is an odious number, because the sum of its binary digits is odd.
The square root of 13391616 is about 3659.4556972315. The cubic root of 13391616 is about 237.4712268005.
The spelling of 13391616 in words is "thirteen million, three hundred ninety-one thousand, six hundred sixteen".