16859231 has 4 divisors (see below), whose sum is σ = 16896264. Its totient is φ = 16822200.

The previous prime is 16859221. The next prime is 16859233. The reversal of 16859231 is 13295861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13295861 = 3217 ⋅4133.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16859231 is a prime.

It is a super-2 number, since 2×16859231² = 568467339822722, 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 = 16859191 and 16859200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16859233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17825 + ... + 18746.

It is an arithmetic number, because the mean of its divisors is an integer number (4224066).

Almost surely, 2^16859231 is an apocalyptic number.

16859231 is a deficient number, since it is larger than the sum of its proper divisors (37033).

16859231 is an equidigital number, since it uses as much as digits as its factorization.

16859231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37032.

The product of its digits is 12960, while the sum is 35.

The square root of 16859231 is about 4105.9993911349. Note that the first 3 decimals coincide. The cubic root of 16859231 is about 256.4164719595.

The spelling of 16859231 in words is "sixteen million, eight hundred fifty-nine thousand, two hundred thirty-one".