16012209 has 16 divisors (see below), whose sum is σ = 22492800. Its totient is φ = 10112256.

The previous prime is 16012207. The next prime is 16012219. The reversal of 16012209 is 90221061.

It is not a de Polignac number, because 16012209 - 2¹ = 16012207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16012207) 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 15 ways as a sum of consecutive naturals, for example, 6457 + ... + 8585.

It is an arithmetic number, because the mean of its divisors is an integer number (1405800).

Almost surely, 2^16012209 is an apocalyptic number.

It is an amenable number.

16012209 is a deficient number, since it is larger than the sum of its proper divisors (6480591).

16012209 is a wasteful number, since it uses less digits than its factorization.

16012209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 16012209 is about 4001.5258339788. The cubic root of 16012209 is about 252.0482869172.

The spelling of 16012209 in words is "sixteen million, twelve thousand, two hundred nine".