165912222 has 16 divisors (see below), whose sum is σ = 379228032. Its totient is φ = 47403480.

The previous prime is 165912203. The next prime is 165912233. The reversal of 165912222 is 222219561.

It is a self number, because there is not a number n which added to its sum of digits gives 165912222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1975104 + ... + 1975187.

It is an arithmetic number, because the mean of its divisors is an integer number (23701752).

Almost surely, 2^165912222 is an apocalyptic number.

165912222 is an abundant number, since it is smaller than the sum of its proper divisors (213315810).

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

165912222 is a wasteful number, since it uses less digits than its factorization.

165912222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950303.

The product of its digits is 4320, while the sum is 30.

The square root of 165912222 is about 12880.6918292458. The cubic root of 165912222 is about 549.4895782456.

The spelling of 165912222 in words is "one hundred sixty-five million, nine hundred twelve thousand, two hundred twenty-two".