165215004 has 12 divisors (see below), whose sum is σ = 385501704. Its totient is φ = 55071664.

The previous prime is 165214999. The next prime is 165215021. The reversal of 165215004 is 400512561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 6883947 + ... + 6883970.

It is an arithmetic number, because the mean of its divisors is an integer number (32125142).

Almost surely, 2^165215004 is an apocalyptic number.

It is an amenable number.

165215004 is an abundant number, since it is smaller than the sum of its proper divisors (220286700).

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

165215004 is a wasteful number, since it uses less digits than its factorization.

165215004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13767924 (or 13767922 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 165215004 is about 12853.5988734673. The cubic root of 165215004 is about 548.7187852447.

Adding to 165215004 its reverse (400512561), we get a palindrome (565727565).

The spelling of 165215004 in words is "one hundred sixty-five million, two hundred fifteen thousand, four".