16117331 has 2 divisors, whose sum is σ = 16117332. Its totient is φ = 16117330.

The previous prime is 16117307. The next prime is 16117333. The reversal of 16117331 is 13371161.

It is a strong prime.

It is an emirp because it is prime and its reverse (13371161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16117331 - 2¹⁴ = 16100947 is a prime.

It is a super-2 number, since 2×16117331² = 519536717127122, which contains 22 as substring.

Together with 16117333, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16117297 and 16117306.

It is not a weakly prime, because it can be changed into another prime (16117333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8058665 + 8058666.

It is an arithmetic number, because the mean of its divisors is an integer number (8058666).

Almost surely, 2^16117331 is an apocalyptic number.

16117331 is a deficient number, since it is larger than the sum of its proper divisors (1).

16117331 is an equidigital number, since it uses as much as digits as its factorization.

16117331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 23.

The square root of 16117331 is about 4014.6395853177. The cubic root of 16117331 is about 252.5986596124.

Adding to 16117331 its reverse (13371161), we get a palindrome (29488492).

The spelling of 16117331 in words is "sixteen million, one hundred seventeen thousand, three hundred thirty-one".