16671231 has 8 divisors (see below), whose sum is σ = 24698160. Its totient is φ = 11114136.

The previous prime is 16671209. The next prime is 16671233. The reversal of 16671231 is 13217661.

It is not a de Polignac number, because 16671231 - 2⁵ = 16671199 is a prime.

It is a super-2 number, since 2×16671231² = 555859886110722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 617453 = 16671231 / (1 + 6 + 6 + 7 + 1 + 2 + 3 + 1).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 16671195 and 16671204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308700 + ... + 308753.

It is an arithmetic number, because the mean of its divisors is an integer number (3087270).

Almost surely, 2^16671231 is an apocalyptic number.

16671231 is a deficient number, since it is larger than the sum of its proper divisors (8026929).

16671231 is an equidigital number, since it uses as much as digits as its factorization.

16671231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617462 (or 617456 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 16671231 is about 4083.0418807551. The cubic root of 16671231 is about 255.4597932808.

Adding to 16671231 its reverse (13217661), we get a palindrome (29888892).

The spelling of 16671231 in words is "sixteen million, six hundred seventy-one thousand, two hundred thirty-one".