16321355 has 4 divisors (see below), whose sum is σ = 19585632. Its totient is φ = 13057080.

The previous prime is 16321351. The next prime is 16321373. The reversal of 16321355 is 55312361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55312361 = 13 ⋅4254797.

It is not a de Polignac number, because 16321355 - 2² = 16321351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16321351) 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, 1632131 + ... + 1632140.

It is an arithmetic number, because the mean of its divisors is an integer number (4896408).

Almost surely, 2^16321355 is an apocalyptic number.

16321355 is a deficient number, since it is larger than the sum of its proper divisors (3264277).

16321355 is an equidigital number, since it uses as much as digits as its factorization.

16321355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264276.

The product of its digits is 2700, while the sum is 26.

The square root of 16321355 is about 4039.9696781040. The cubic root of 16321355 is about 253.6600480345.

The spelling of 16321355 in words is "sixteen million, three hundred twenty-one thousand, three hundred fifty-five".