165222412 has 12 divisors (see below), whose sum is σ = 294595056. Its totient is φ = 81052400.

The previous prime is 165222401. The next prime is 165222413. The reversal of 165222412 is 214222561.

It is not an unprimeable number, because it can be changed into a prime (165222413) 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 3 ways as a sum of consecutive naturals, for example, 389464 + ... + 389887.

It is an arithmetic number, because the mean of its divisors is an integer number (24549588).

Almost surely, 2^165222412 is an apocalyptic number.

It is an amenable number.

165222412 is a deficient number, since it is larger than the sum of its proper divisors (129372644).

165222412 is a wasteful number, since it uses less digits than its factorization.

165222412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779408 (or 779406 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 165222412 is about 12853.8870385576. The cubic root of 165222412 is about 548.7269863723.

Adding to 165222412 its reverse (214222561), we get a palindrome (379444973).

The spelling of 165222412 in words is "one hundred sixty-five million, two hundred twenty-two thousand, four hundred twelve".