16861222 has 16 divisors (see below), whose sum is σ = 29313792. Its totient is φ = 7124040.

The previous prime is 16861217. The next prime is 16861223. The reversal of 16861222 is 22216861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16861223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7488 + ... + 9475.

It is an arithmetic number, because the mean of its divisors is an integer number (1832112).

Almost surely, 2^16861222 is an apocalyptic number.

16861222 is a deficient number, since it is larger than the sum of its proper divisors (12452570).

16861222 is a wasteful number, since it uses less digits than its factorization.

16861222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17043.

The product of its digits is 2304, while the sum is 28.

The square root of 16861222 is about 4106.2418340862. The cubic root of 16861222 is about 256.4265654428.

The spelling of 16861222 in words is "sixteen million, eight hundred sixty-one thousand, two hundred twenty-two".