165216104 has 32 divisors (see below), whose sum is σ = 315955200. Its totient is φ = 80974080.

The previous prime is 165216091. The next prime is 165216113. The reversal of 165216104 is 401612561.

It is a super-2 number, since 2×165216104² = 54592722041877632, which contains 22 as substring.

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, 128537 + ... + 129815.

It is an arithmetic number, because the mean of its divisors is an integer number (9873600).

Almost surely, 2^165216104 is an apocalyptic number.

It is an amenable number.

165216104 is a deficient number, since it is larger than the sum of its proper divisors (150739096).

165216104 is a wasteful number, since it uses less digits than its factorization.

165216104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 165216104 is about 12853.6416629685. The cubic root of 165216104 is about 548.7200030302.

Adding to 165216104 its reverse (401612561), we get a palindrome (566828665).

The spelling of 165216104 in words is "one hundred sixty-five million, two hundred sixteen thousand, one hundred four".