165281136 has 40 divisors (see below), whose sum is σ = 435039120. Its totient is φ = 54053376.

The previous prime is 165281111. The next prime is 165281141. The reversal of 165281136 is 631182561.

It is a junction number, because it is equal to n+sod(n) for n = 165281097 and 165281106.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 29941 + ... + 35028.

It is an arithmetic number, because the mean of its divisors is an integer number (10875978).

Almost surely, 2^165281136 is an apocalyptic number.

165281136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165281136 is an abundant number, since it is smaller than the sum of its proper divisors (269757984).

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

165281136 is a wasteful number, since it uses less digits than its factorization.

165281136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65033 (or 65027 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 165281136 is about 12856.1711251834. The cubic root of 165281136 is about 548.7919889069.

The spelling of 165281136 in words is "one hundred sixty-five million, two hundred eighty-one thousand, one hundred thirty-six".