165005140 has 12 divisors (see below), whose sum is σ = 346510836. Its totient is φ = 66002048.

The previous prime is 165005119. The next prime is 165005143. The reversal of 165005140 is 41500561.

It can be written as a sum of positive squares in 2 ways, for example, as 83247376 + 81757764 = 9124^2 + 9042^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165005143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4125109 + ... + 4125148.

It is an arithmetic number, because the mean of its divisors is an integer number (28875903).

Almost surely, 2^165005140 is an apocalyptic number.

165005140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165005140 is an abundant number, since it is smaller than the sum of its proper divisors (181505696).

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

165005140 is a wasteful number, since it uses less digits than its factorization.

165005140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8250266 (or 8250264 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 165005140 is about 12845.4326513356. The cubic root of 165005140 is about 548.4863505186.

The spelling of 165005140 in words is "one hundred sixty-five million, five thousand, one hundred forty".