165630210 has 64 divisors (see below), whose sum is σ = 412369920. Its totient is φ = 42531840.

The previous prime is 165630197. The next prime is 165630221. The reversal of 165630210 is 12036561.

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 31 ways as a sum of consecutive naturals, for example, 290806 + ... + 291374.

It is an arithmetic number, because the mean of its divisors is an integer number (6443280).

Almost surely, 2^165630210 is an apocalyptic number.

165630210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165630210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206184960).

165630210 is an abundant number, since it is smaller than the sum of its proper divisors (246739710).

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

165630210 is a wasteful number, since it uses less digits than its factorization.

165630210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 165630210 is about 12869.7400906157. The cubic root of 165630210 is about 549.1780670618.

Adding to 165630210 its reverse (12036561), we get a palindrome (177666771).

The spelling of 165630210 in words is "one hundred sixty-five million, six hundred thirty thousand, two hundred ten".