16680231 has 12 divisors (see below), whose sum is σ = 24176152. Its totient is φ = 11082096.

The previous prime is 16680227. The next prime is 16680239. The reversal of 16680231 is 13208661.

It is not a de Polignac number, because 16680231 - 2² = 16680227 is a prime.

It is a super-2 number, since 2×16680231² = 556460212426722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16680195 and 16680204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680239) 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, 256 + ... + 5781.

Almost surely, 2^16680231 is an apocalyptic number.

16680231 is a deficient number, since it is larger than the sum of its proper divisors (7495921).

16680231 is a wasteful number, since it uses less digits than its factorization.

16680231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6350 (or 6347 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16680231 is about 4084.1438515312. The cubic root of 16680231 is about 255.5057551843.

Adding to 16680231 its reverse (13208661), we get a palindrome (29888892).

The spelling of 16680231 in words is "sixteen million, six hundred eighty thousand, two hundred thirty-one".