165011250 has 80 divisors (see below), whose sum is σ = 418366080. Its totient is φ = 43368000.

The previous prime is 165011243. The next prime is 165011263. The reversal of 165011250 is 52110561.

It is a Curzon number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 295972 + ... + 296528.

It is an arithmetic number, because the mean of its divisors is an integer number (5229576).

Almost surely, 2^165011250 is an apocalyptic number.

165011250 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 165011250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209183040).

165011250 is an abundant number, since it is smaller than the sum of its proper divisors (253354830).

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

165011250 is an equidigital number, since it uses as much as digits as its factorization.

165011250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 165011250 is about 12845.6704768572. The cubic root of 165011250 is about 548.4931204294.

The spelling of 165011250 in words is "one hundred sixty-five million, eleven thousand, two hundred fifty".