15966222 has 16 divisors (see below), whose sum is σ = 32216400. Its totient is φ = 5274752.

The previous prime is 15966221. The next prime is 15966239. The reversal of 15966222 is 22266951.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15966221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11097 + ... + 12452.

It is an arithmetic number, because the mean of its divisors is an integer number (2013525).

Almost surely, 2^15966222 is an apocalyptic number.

15966222 is an abundant number, since it is smaller than the sum of its proper divisors (16250178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15966222 is a wasteful number, since it uses less digits than its factorization.

15966222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23667.

The product of its digits is 12960, while the sum is 33.

The square root of 15966222 is about 3995.7755192203. The cubic root of 15966222 is about 251.8067616600.

The spelling of 15966222 in words is "fifteen million, nine hundred sixty-six thousand, two hundred twenty-two".