16304231 has 4 divisors (see below), whose sum is σ = 16611912. Its totient is φ = 15996552.

The previous prime is 16304213. The next prime is 16304243. The reversal of 16304231 is 13240361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13240361 = 239 ⋅55399.

It is a cyclic number.

It is not a de Polignac number, because 16304231 - 2¹⁰ = 16303207 is a prime.

It is a super-2 number, since 2×16304231² = 531655897002722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16304251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153761 + ... + 153866.

It is an arithmetic number, because the mean of its divisors is an integer number (4152978).

Almost surely, 2^16304231 is an apocalyptic number.

16304231 is a deficient number, since it is larger than the sum of its proper divisors (307681).

16304231 is an equidigital number, since it uses as much as digits as its factorization.

16304231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307680.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 16304231 is about 4037.8497990886. The cubic root of 16304231 is about 253.5713055119.

Adding to 16304231 its reverse (13240361), we get a palindrome (29544592).

The spelling of 16304231 in words is "sixteen million, three hundred four thousand, two hundred thirty-one".