16318213 has 8 divisors (see below), whose sum is σ = 17057880. Its totient is φ = 15590400.

The previous prime is 16318189. The next prime is 16318229. The reversal of 16318213 is 31281361.

It can be written as a sum of positive squares in 4 ways, for example, as 6874884 + 9443329 = 2622^2 + 3073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-16318213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16318273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88 + ... + 5713.

It is an arithmetic number, because the mean of its divisors is an integer number (2132235).

Almost surely, 2^16318213 is an apocalyptic number.

It is an amenable number.

16318213 is a deficient number, since it is larger than the sum of its proper divisors (739667).

16318213 is an equidigital number, since it uses as much as digits as its factorization.

16318213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927.

The product of its digits is 864, while the sum is 25.

The square root of 16318213 is about 4039.5807950826. The cubic root of 16318213 is about 253.6437697492.

Adding to 16318213 its reverse (31281361), we get a palindrome (47599574).

The spelling of 16318213 in words is "sixteen million, three hundred eighteen thousand, two hundred thirteen".