165021112 has 32 divisors (see below), whose sum is σ = 315946800. Its totient is φ = 80780544.

The previous prime is 165021097. The next prime is 165021121. The reversal of 165021112 is 211120561.

It is a self number, because there is not a number n which added to its sum of digits gives 165021112.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 147178 + ... + 148294.

Almost surely, 2^165021112 is an apocalyptic number.

It is an amenable number.

165021112 is a deficient number, since it is larger than the sum of its proper divisors (150925688).

165021112 is a wasteful number, since it uses less digits than its factorization.

165021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 165021112 is about 12846.0543358652. The cubic root of 165021112 is about 548.5040472226.

Adding to 165021112 its reverse (211120561), we get a palindrome (376141673).

The spelling of 165021112 in words is "one hundred sixty-five million, twenty-one thousand, one hundred twelve".