165021104 has 20 divisors (see below), whose sum is σ = 324971760. Its totient is φ = 81157440.

The previous prime is 165021097. The next prime is 165021121. The reversal of 165021104 is 401120561.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83564 + ... + 85515.

It is an arithmetic number, because the mean of its divisors is an integer number (16248588).

Almost surely, 2^165021104 is an apocalyptic number.

It is an amenable number.

165021104 is a deficient number, since it is larger than the sum of its proper divisors (159950656).

165021104 is a wasteful number, since it uses less digits than its factorization.

165021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169148 (or 169142 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 165021104 is about 12846.0540244855. The cubic root of 165021104 is about 548.5040383590.

Adding to 165021104 its reverse (401120561), we get a palindrome (566141665).

The spelling of 165021104 in words is "one hundred sixty-five million, twenty-one thousand, one hundred four".