16535 has 4 divisors (see below), whose sum is σ = 19848. Its totient is φ = 13224.

The previous prime is 16529. The next prime is 16547. The reversal of 16535 is 53561.

16535 is digitally balanced in base 3 and base 6, because in such bases 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 an emirpimes, since its reverse is a distinct semiprime: 53561 = 19 ⋅2819.

It is a cyclic number.

It is not a de Polignac number, because 16535 - 2⁴ = 16519 is a prime.

It is a Duffinian number.

16535 is strictly pandigital in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649 + ... + 1658.

It is an arithmetic number, because the mean of its divisors is an integer number (4962).

2¹⁶⁵³⁵ is an apocalyptic number.

16535 is a deficient number, since it is larger than the sum of its proper divisors (3313).

16535 is an equidigital number, since it uses as much as digits as its factorization.

16535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312.

The product of its digits is 450, while the sum is 20.

The square root of 16535 is about 128.5884909313. The cubic root of 16535 is about 25.4762048949.

It can be divided in two parts, 165 and 35, that multiplied together give a palindrome (5775).

The spelling of 16535 in words is "sixteen thousand, five hundred thirty-five".