16328831 has 4 divisors (see below), whose sum is σ = 16337952. Its totient is φ = 16319712.

The previous prime is 16328801. The next prime is 16328833. The reversal of 16328831 is 13882361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16328831 is a prime.

It is a super-2 number, since 2×16328831² = 533261443653122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16328833) 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, 890 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (4084488).

Almost surely, 2^16328831 is an apocalyptic number.

16328831 is a deficient number, since it is larger than the sum of its proper divisors (9121).

16328831 is an equidigital number, since it uses as much as digits as its factorization.

16328831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9120.

The product of its digits is 6912, while the sum is 32.

The square root of 16328831 is about 4040.8948266442. The cubic root of 16328831 is about 253.6987718016.

The spelling of 16328831 in words is "sixteen million, three hundred twenty-eight thousand, eight hundred thirty-one".