36521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12563 = 17 ⋅739.
It is a cyclic number.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 36521.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 36521.
236521 is an apocalyptic number.
It is an amenable number.
36521 is an equidigital number, since it uses as much as digits as its factorization.
36521 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 678.
The square root of 36521 is about 191.1046833544. The cubic root of 36521 is about 33.1777976102.
The spelling of 36521 in words is "thirty-six thousand, five hundred twenty-one".