16535243 has 4 divisors (see below), whose sum is σ = 16557408. Its totient is φ = 16513080.

The previous prime is 16535219. The next prime is 16535257. The reversal of 16535243 is 34253561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16535243 - 2⁶ = 16535179 is a prime.

It is a super-2 number, since 2×16535243² = 546828522138098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16535293) 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, 9923 + ... + 11468.

It is an arithmetic number, because the mean of its divisors is an integer number (4139352).

Almost surely, 2^16535243 is an apocalyptic number.

16535243 is a deficient number, since it is larger than the sum of its proper divisors (22165).

16535243 is an equidigital number, since it uses as much as digits as its factorization.

16535243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22164.

The product of its digits is 10800, while the sum is 29.

The square root of 16535243 is about 4066.3550017184. The cubic root of 16535243 is about 254.7632969452.

The spelling of 16535243 in words is "sixteen million, five hundred thirty-five thousand, two hundred forty-three".