16321317 has 8 divisors (see below), whose sum is σ = 21986496. Its totient is φ = 10768512.

The previous prime is 16321303. The next prime is 16321351. The reversal of 16321317 is 71312361.

16321317 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16321317 - 2⁴ = 16321301 is a prime.

It is a super-2 number, since 2×16321317² = 532770777228978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16321387) 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, 27753 + ... + 28334.

It is an arithmetic number, because the mean of its divisors is an integer number (2748312).

Almost surely, 2^16321317 is an apocalyptic number.

It is an amenable number.

16321317 is a deficient number, since it is larger than the sum of its proper divisors (5665179).

16321317 is an equidigital number, since it uses as much as digits as its factorization.

16321317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56187.

The product of its digits is 756, while the sum is 24.

The square root of 16321317 is about 4039.9649750957. The cubic root of 16321317 is about 253.6598511740.

Adding to 16321317 its reverse (71312361), we get a palindrome (87633678).

The spelling of 16321317 in words is "sixteen million, three hundred twenty-one thousand, three hundred seventeen".