16718231 has 2 divisors, whose sum is σ = 16718232. Its totient is φ = 16718230.

The previous prime is 16718213. The next prime is 16718249. The reversal of 16718231 is 13281761.

Together with previous prime (16718213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (16718213) and next prime (16718249).

It is an emirp because it is prime and its reverse (13281761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16718231 - 2¹⁴ = 16701847 is a prime.

It is a super-2 number, since 2×16718231² = 558998495538722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16718194 and 16718203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16718281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8359115 + 8359116.

It is an arithmetic number, because the mean of its divisors is an integer number (8359116).

Almost surely, 2^16718231 is an apocalyptic number.

16718231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16718231 is an equidigital number, since it uses as much as digits as its factorization.

16718231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 16718231 is about 4088.7933427846. The cubic root of 16718231 is about 255.6996344939.

Adding to 16718231 its reverse (13281761), we get a palindrome (29999992).

The spelling of 16718231 in words is "sixteen million, seven hundred eighteen thousand, two hundred thirty-one".