16816243 has 4 divisors (see below), whose sum is σ = 17547408. Its totient is φ = 16085080.

The previous prime is 16816231. The next prime is 16816249. The reversal of 16816243 is 34261861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34261861 = 109 ⋅314329.

It is a cyclic number.

It is not a de Polignac number, because 16816243 - 2¹⁷ = 16685171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16816249) 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, 365548 + ... + 365593.

It is an arithmetic number, because the mean of its divisors is an integer number (4386852).

Almost surely, 2^16816243 is an apocalyptic number.

16816243 is a deficient number, since it is larger than the sum of its proper divisors (731165).

16816243 is an equidigital number, since it uses as much as digits as its factorization.

16816243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731164.

The product of its digits is 6912, while the sum is 31.

The square root of 16816243 is about 4100.7612707886. The cubic root of 16816243 is about 256.1983478680.

The spelling of 16816243 in words is "sixteen million, eight hundred sixteen thousand, two hundred forty-three".