165984285 has 32 divisors (see below), whose sum is σ = 282216960. Its totient is φ = 83066688.

The previous prime is 165984283. The next prime is 165984289. The reversal of 165984285 is 582489561.

165984285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165984285 - 2¹ = 165984283 is a prime.

It is a super-2 number, since 2×165984285² = 55101565733922450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165984283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27774 + ... + 33216.

It is an arithmetic number, because the mean of its divisors is an integer number (8819280).

Almost surely, 2^165984285 is an apocalyptic number.

165984285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165984285 is a deficient number, since it is larger than the sum of its proper divisors (116232675).

165984285 is a wasteful number, since it uses less digits than its factorization.

165984285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577.

The product of its digits is 691200, while the sum is 48.

The square root of 165984285 is about 12883.4888520152. The cubic root of 165984285 is about 549.5691225881.

The spelling of 165984285 in words is "one hundred sixty-five million, nine hundred eighty-four thousand, two hundred eighty-five".