16031317 has 2 divisors, whose sum is σ = 16031318. Its totient is φ = 16031316.

The previous prime is 16031297. The next prime is 16031333. The reversal of 16031317 is 71313061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11195716 + 4835601 = 3346^2 + 2199^2 .

It is a cyclic number.

It is not a de Polignac number, because 16031317 - 2¹¹ = 16029269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16031377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8015658 + 8015659.

It is an arithmetic number, because the mean of its divisors is an integer number (8015659).

Almost surely, 2^16031317 is an apocalyptic number.

It is an amenable number.

16031317 is a deficient number, since it is larger than the sum of its proper divisors (1).

16031317 is an equidigital number, since it uses as much as digits as its factorization.

16031317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 16031317 is about 4003.9127113362. The cubic root of 16031317 is about 252.1485067802.

Adding to 16031317 its reverse (71313061), we get a palindrome (87344378).

The spelling of 16031317 in words is "sixteen million, thirty-one thousand, three hundred seventeen".