165122240 has 56 divisors (see below), whose sum is σ = 395325600. Its totient is φ = 65691648.

The previous prime is 165122239. The next prime is 165122257. The reversal of 165122240 is 42221561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62384 + ... + 64976.

Almost surely, 2^165122240 is an apocalyptic number.

165122240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197662800).

165122240 is an abundant number, since it is smaller than the sum of its proper divisors (230203360).

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

165122240 is a wasteful number, since it uses less digits than its factorization.

165122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809 (or 2799 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 165122240 is about 12849.9898832645. The cubic root of 165122240 is about 548.6160688293.

The spelling of 165122240 in words is "one hundred sixty-five million, one hundred twenty-two thousand, two hundred forty".