16943231 has 4 divisors (see below), whose sum is σ = 17835000. Its totient is φ = 16051464.

The previous prime is 16943219. The next prime is 16943233. The reversal of 16943231 is 13234961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16943231 - 2⁶ = 16943167 is a prime.

It is a super-2 number, since 2×16943231² = 574146153438722, 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 = 16943194 and 16943203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16943233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445856 + ... + 445893.

It is an arithmetic number, because the mean of its divisors is an integer number (4458750).

Almost surely, 2^16943231 is an apocalyptic number.

16943231 is a deficient number, since it is larger than the sum of its proper divisors (891769).

16943231 is an equidigital number, since it uses as much as digits as its factorization.

16943231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891768.

The product of its digits is 3888, while the sum is 29.

The square root of 16943231 is about 4116.2156163155. The cubic root of 16943231 is about 256.8416259923.

The spelling of 16943231 in words is "sixteen million, nine hundred forty-three thousand, two hundred thirty-one".