16431317 has 12 divisors (see below), whose sum is σ = 19387296. Its totient is φ = 13882680.

The previous prime is 16431301. The next prime is 16431343. The reversal of 16431317 is 71313461.

It is not a de Polignac number, because 16431317 - 2⁴ = 16431301 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 (16431377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1118 + ... + 5840.

It is an arithmetic number, because the mean of its divisors is an integer number (1615608).

Almost surely, 2^16431317 is an apocalyptic number.

It is an amenable number.

16431317 is a deficient number, since it is larger than the sum of its proper divisors (2955979).

16431317 is an equidigital number, since it uses as much as digits as its factorization.

16431317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4808 (or 4801 counting only the distinct ones).

The product of its digits is 1512, while the sum is 26.

The square root of 16431317 is about 4053.5560931113. The cubic root of 16431317 is about 254.2284354518.

Adding to 16431317 its reverse (71313461), we get a palindrome (87744778).

The spelling of 16431317 in words is "sixteen million, four hundred thirty-one thousand, three hundred seventeen".