165211004 has 24 divisors (see below), whose sum is σ = 347813760. Its totient is φ = 67077936.

The previous prime is 165211003. The next prime is 165211019. The reversal of 165211004 is 400112561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165211003) by changing a digit.

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, 154742 + ... + 155805.

It is an arithmetic number, because the mean of its divisors is an integer number (14492240).

Almost surely, 2^165211004 is an apocalyptic number.

165211004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

165211004 is an abundant number, since it is smaller than the sum of its proper divisors (182602756).

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

165211004 is a wasteful number, since it uses less digits than its factorization.

165211004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310577 (or 310575 counting only the distinct ones).

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

The square root of 165211004 is about 12853.4432740803. The cubic root of 165211004 is about 548.7143568881.

Adding to 165211004 its reverse (400112561), we get a palindrome (565323565).

The spelling of 165211004 in words is "one hundred sixty-five million, two hundred eleven thousand, four".