16855147 has 4 divisors (see below), whose sum is σ = 17742280. Its totient is φ = 15968016.

The previous prime is 16855133. The next prime is 16855151. The reversal of 16855147 is 74155861.

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 16855147 - 2⁷ = 16855019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16855747) 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, 443538 + ... + 443575.

It is an arithmetic number, because the mean of its divisors is an integer number (4435570).

Almost surely, 2^16855147 is an apocalyptic number.

16855147 is a deficient number, since it is larger than the sum of its proper divisors (887133).

16855147 is an equidigital number, since it uses as much as digits as its factorization.

16855147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887132.

The product of its digits is 33600, while the sum is 37.

The square root of 16855147 is about 4105.5020399459. The cubic root of 16855147 is about 256.3957654112.

The spelling of 16855147 in words is "sixteen million, eight hundred fifty-five thousand, one hundred forty-seven".