165216414 has 64 divisors (see below), whose sum is σ = 368831232. Its totient is φ = 48921600.

The previous prime is 165216349. The next prime is 165216437. The reversal of 165216414 is 414612561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 838564 + ... + 838760.

It is an arithmetic number, because the mean of its divisors is an integer number (5762988).

Almost surely, 2^165216414 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165216414, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184415616).

165216414 is an abundant number, since it is smaller than the sum of its proper divisors (203614818).

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

165216414 is a wasteful number, since it uses less digits than its factorization.

165216414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its digits is 5760, while the sum is 30.

The square root of 165216414 is about 12853.6537218022. The cubic root of 165216414 is about 548.7203462234.

Adding to 165216414 its reverse (414612561), we get a palindrome (579828975).

The spelling of 165216414 in words is "one hundred sixty-five million, two hundred sixteen thousand, four hundred fourteen".